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A Sacred Oath: Memoirs of a Secretary of Defense During Extraordinary Times Hardcover – May 10, 2022

4.4 out of 5 stars 993 ratings

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INSTANT NEW YORK TIMES BESTSELLER

Former Secretary of Defense Mark T. Esper reveals the shocking details of his tumultuous tenure while serving in the Trump administration.

From June of 2019 until his firing by President Trump after the November 2020 election, Secretary Mark T. Esper led the Department of Defense through an unprecedented time in history—a period marked by growing threats and conflict abroad, a global pandemic unseen in a century, the greatest domestic unrest in two generations, and a White House seemingly bent on breaking accepted norms and conventions for political advantage. A Sacred Oath is Secretary Esper’s unvarnished and candid memoir of those extraordinary and dangerous times, and includes events and moments never before told.

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Editorial Reviews

Review

A Sacred Oath pulls no punches. It depicts Trump as unfit for office and a threat to democracy, a prisoner of wrath, impulse and appetite. Over 752 pages, Esper’s Memoirs of a Secretary of Defense During Extraordinary Times are surgically precise in their score-settling. This is not just another book to be tossed on the pyre of Trump-alumni revenge porn. It is scary and sobering.” — The Guardian

“Mr. Esper details the all-consuming task of managing America’s largest and most vital cabinet department—instructive reading for those unfamiliar with what operationalizing national security policy decisions involves. Time and again, he shows how presidential inattention, ignorance, incuriosity, duplicity and unwillingness to take responsibility for hard decisions all put the United States at risk…. A Sacred Oath is not a gratuitous tell-all. It is a work of history. Mr. Esper has his perspectives, to which he is entitled, but his willingness to go on the record at length is invaluable. Look forward to the reaction from Mar-a-Lago.” — Wall Street Journal

“A damning portrait of a chaotic, inept administration that posed countless dangers to the nation and the world.” — Kirkus Reviews

About the Author

Mark T. Esper served as secretary of defense from 2019 to 2020 and as secretary of the Army from 2017 to 2019. A distinguished graduate of West Point, he spent twenty-one years in uniform, including a combat tour in the 1991 Gulf War. Esper earned a Ph.D. from George Washington University while working on Capitol Hill and at the Pentagon as a political appointee. He was also a senior executive at a prestigious think tank, at various business associations and commission, and at a Fortune 100 technology company. Esper is the recipient of multiple civilian and military awards, and currently sits on several public policy and business boards.

Product details

  • Publisher ‏ : ‎ William Morrow
  • Publication date ‏ : ‎ May 10, 2022
  • Language ‏ : ‎ English
  • Print length ‏ : ‎ 752 pages
  • ISBN-10 ‏ : ‎ 006314431X
  • ISBN-13 ‏ : ‎ 978-0063144316
  • Item Weight ‏ : ‎ 2 pounds
  • Dimensions ‏ : ‎ 6 x 1.75 x 9 inches
  • Best Sellers Rank: #134,712 in Books (See Top 100 in Books)
  • Customer Reviews:
    4.4 out of 5 stars 993 ratings

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Customer reviews

4.4 out of 5 stars
993 global ratings

Customers say

Customers find the book engaging and well-written, with excellent insights into Washington workings. Moreover, they appreciate the author's honesty, with one customer noting it provides an honest portrayal of events. However, the book receives mixed feedback regarding its detail level, with several customers finding it overly detailed. Additionally, the narrative quality and length receive mixed reactions, with one customer describing it as an interesting account while others find it long-winded. Several customers consider the book not worth the money.

22 customers mention "Readability"20 positive2 negative

Customers find the book interesting and enjoyable to read, with one mentioning it held their attention throughout its length.

"Interesting but very long winded. There are some interesting revelations, but you need to read a lot of fluff to get to them." Read more

"...The author details his time in the military in a way I found both very interesting and very enlightening...." Read more

"...Great read for sure." Read more

"Interesting book..." Read more

18 customers mention "Insight"18 positive0 negative

Customers find the book insightful, providing excellent insights into the workings of government, with one customer noting it offers a balanced perspective without obvious political bias.

"...As my summary above states, it was such an excellent insight into the workings of our department of defense on a day-to-day basis...." Read more

"...time in the military in a way I found both very interesting and very enlightening. I thought I knew quite a lot about the Dept. of Defense...." Read more

"...Gives you insights into what goes on in Washington." Read more

"...name-calling "book", which ended up in my trash, this book gives real insight on what it was like to be on the "Trump team."..." Read more

11 customers mention "Writing style"8 positive3 negative

Customers appreciate the writing style of the book.

"...Thank God we had him serving in this very important position. Well written and an interesting read." Read more

"...The book is well-written, but rather long. And, he really needed to tone down the patting himself on the back somewhat...." Read more

"This book really needed an editor. The writer goes down so many rabbit holes it's hard to stay focused on what he's describing...." Read more

"This book is a well written account of Secretary Esper’s tenure as our Secretary of Defense...." Read more

9 customers mention "Honesty"9 positive0 negative

Customers appreciate the book's honesty, with one customer noting it provides an insider look into true politics.

"...It is an honest and interesting account written by one of most qualified appointments...." Read more

"...Author was honest about what went right and what didn't, taking and assigning blame where it belonged without bashjng. Highly recommend." Read more

"...I felt the author was candid and sincere without political aspirations of his own though right in the middle of political battles almost daily...." Read more

"...I think this is an accurate portrayal of the challenges facing the military community...." Read more

4 customers mention "Detail"2 positive2 negative

Customers have mixed opinions about the level of detail in the book, with some finding it excessive.

"...This is one of the best. Easy to understand because explanations of terminology was included...." Read more

"...He is a master at organizational administration. The good has slight too much detail but overall I would strongly recommend the read as it shares..." Read more

"Excellent descriptions about life at DoD during an incredibly dysfunctional presidency...." Read more

"A bit too much detail..." Read more

4 customers mention "Narrative quality"2 positive2 negative

Customers have mixed opinions about the narrative quality of the book, with one finding it interesting while another notes it lacks clear historical context.

"...It is an honest and interesting account written by one of most qualified appointments...." Read more

"Story is scary. Esper should have come forth sooner." Read more

"Esper tells the story of service and steadiness during an unprecedented time. Not a tell all - an interesting and eye opening account." Read more

"Interesting, but lacks a clear narratives of real history, scores settled here...." Read more

7 customers mention "Length"2 positive5 negative

Customers find the book's length negative, describing it as rather long and very long-winded.

"...The book is well-written, but rather long. And, he really needed to tone down the patting himself on the back somewhat...." Read more

"A book that is honest on both sides. A bit long as somethings were duplicated throughout the book. But, very interesting and thought provoking book!..." Read more

"Very long book….not always interesting..." Read more

"Interesting but very long winded. There are some interesting revelations, but you need to read a lot of fluff to get to them." Read more

5 customers mention "Value for money"1 positive4 negative

Customers find the book not worth the money.

"...Self serving at it's worst. Not worth the money, waste of time"...." Read more

"Esper’s inside memoir exposes Trump’s ignorance, stupidity, immorality and treasonous behavior, coming from the secretary of defense indicates how..." Read more

"...Not worth the $." Read more

"...affairs and the role of The United States in them, this is well worth your time...." Read more

Esper steps up to clarify role of Sec. of Defense in Trump admin
4 out of 5 stars
Esper steps up to clarify role of Sec. of Defense in Trump admin
I’m guessing most Americans, outside of government and political news junkies, had never really heard of Esper until Trump’s infamous “church walk/photo op” in June 2020 in which Esper declares that he was basically manipulated into the operation—as recounted in the chapter entitled “A Walk in the Park. But in the subsequent months, he conducted himself with honor, despite the seemingly daily danger of being fired for “disloyalty” to Trump. Overall, the memoirist is fair-minded as to politics, even regarding Chuck Schumer. Though his various comments on “the media” are reminiscent of conservative politicos who have been publishing memoirs complaining about their treatment by reporters. But this book really becomes valuable as Esper covers the increasingly failing Trump period following the church-walk fiasco. We find, time after time, how the Secretary of Defense pushes back, and hard, against Trump wanting to provide “military” solutions to domestic unrest. The portrait of Trump reinforces our continuing understanding of someone who seems to have a short fuse and even shorter attention span. Right wing conservatives are not going to like these assessments. On a somewhat negative side, the book has a self-serving aura and reads a bit like a resume overall, as other reviewers have noted. Also, Esper spends a great deal of space defending the National Guard -- one of his former service assignments -- especially regarding the June event. But he doesn’t seem to realize that Americans don’t really make a distinction among “law enforcement” and “military.” If Americans (in person or watching TV news) see protesters being “managed” by uniformed officers, they don’t stop to ask whether they’re Park Police, National Guard, MPs, local city police or armed forces—they’re just uniforms. Later, in his press conference transcript (appendix), he spends a lot of time ducking an incident involving a "medevac" helicopter that was clearly meant to intimidate protesters. This might not be a big deal in retrospect, but why not give us the benefit of your subsequent research instead of leaving it as “we still have to find the facts” in the press conference transcript at the time? (pp 688ff-Appendix) To Esper’s credit, he viewed his job as keeping things non-political, a point he continually reinforces (perhaps overdoing it) as well as avoiding “military solutions” which Trump kept pushing by trying to invoke the Insurrection Act, esp. in the northwest. We learn that his stable allies throughout are joint chiefs of staff chair General Milley as well as A.G. Bill Barr, often against Mark Meadows (former WH Chief of Staff, Robert O’Brien (Trump’s national security advisor, mentioned 33 times), and Stephen Miller (senior Trump advisor). Esper notes thatTrump’s main concern is to make sure he doesn’t “look weak” (e.g. p634) The issue of military bases named after Confederate idols is well covered and once again we find Esper dealing fairly with this sensitive and complex issue (pp 645ff). Esper was eventually dismissed by Trump on Nov. 9, 2021, pretty much as expected. As he says, the long knives were out and “brandished in the open” (p 661). He could have resigned earlier but felt that he, Milley and others needed to be in place to counter rash moves by Trump. He, Milley and others were the guardrail against Trump’s lack of governing expertise. And he was well-aware that if he left too early, he’d be replaced by a Trump yes-man. 𝙆𝙚𝙮 𝙦𝙪𝙤𝙩𝙚: Regarding May-June demonstrations in cities across the country and especially D.C., Trump kept pressing to use active duty forces: “Trump became angrier. ‘We look weak’ and then.. ‘You are losers!’ directed at Esper, Milley, Barr and even VP Pence. ‘None of you have any backbone to stand up to the violence...Can’t you just shoot them? [protesters] Just shoot them in the legs or something,’ he asked.” (Ch. 12, 338-9). 𝙋𝙪𝙗𝙡𝙞𝙨𝙝𝙞𝙣𝙜 𝙥𝙧𝙤𝙗𝙡𝙚𝙢. The book’s title appears on the top of each right-hand page instead of the chapter title, which means you have no idea where any chapter begins or ends without flipping through all the pages. And the author's name is on each left-side page. C'mon publishers: get a clue! 𝙋𝙪𝙗𝙡𝙞𝙨𝙝𝙞𝙣𝙜 𝙤𝙙𝙙𝙞𝙩𝙮. There are numerous redacted words and phrases. I’ve never seen this in a published mainstream book and it’s not clear why the editors didn’t simply cut the material out and paraphrase since none of the material is part of a quote. But this does add some visual credibility to the narrative. 𝐈𝐧 𝐬𝐮𝐦: As with other recent political memoirs such as those by Barr, Boehner and Bolton, there’s an air of self-justification throughout the book, almost as though that’s the underlying purpose--to clear your name for posterity. But if you can get past that tone, this book is well worth at least browsing through for your areas of interest.
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Top reviews from the United States

  • Reviewed in the United States on July 26, 2025
    Format: HardcoverVerified Purchase
    I'm an avid reader of political and military nonfiction books. This is one of the best. Easy to understand because explanations of terminology was included. Author was honest about what went right and what didn't, taking and assigning blame where it belonged without bashjng. Highly recommend.
  • Reviewed in the United States on September 3, 2024
    Format: HardcoverVerified Purchase
    Really good book. The author details his time in the military in a way I found both very interesting and very enlightening. I thought I knew quite a lot about the Dept. of Defense. Completely wrong. I knew hardly anything. Loved the author’s descriptions of how DoD works. And, of course, his comments on interacting with Donald Trump were a combination of hysterical and horrifying. Great book by a good man and a patriot.
    10 people found this helpful
    Report
  • Reviewed in the United States on November 24, 2024
    Format: HardcoverVerified Purchase
    This is a very interesting book and add a perfect time to read it. Gives you insights into what goes on in Washington.
  • Reviewed in the United States on May 15, 2025
    Format: HardcoverVerified Purchase
    Great review.
  • Reviewed in the United States on February 23, 2023
    Format: HardcoverVerified Purchase
    If you prefer light subjects don't read this. If you want to take the time to really expand your knowledge of world affairs and the role of The United States in them, this is well worth your time. It's also a huge indictment of Donald Trump from someone who was there: Esper was Trump's Secretary of Defense for the last 18 months of the Trump administration. Example: Trump was not joking when he suggested that we bomb drug labs in Mexico. Esper was in shock at the suggestion because: A. Any bombing would be considered an act of war upon a country which is our ally. B. It inevitably would kill innocent civilians. Just one of the MANY examples of when Esper had to use his own ethics and common sense to guide Trump away from a horrible decision that would have had huge negative consequences.
    22 people found this helpful
    Report
  • Reviewed in the United States on October 12, 2022
    Format: HardcoverVerified Purchase
    I never knew much about Secr. of Defense Esper while he was in the role. I got the book hoping to get an inside look at the Trump administration from a DOD perspective. The book provides some of that so it is not a total waste. However, a lot of the book is basically a self justification for what he did and why he stayed in the job. That kind of apologist writing is much better when done by someone else on your behalf. While it may be an honest explanation when done by the person himself, it does not come off well. Unless you are really curious about Esper personally, you can pass on this book as offering any major insights on Trump and his actions. (I would contrast this with Deborah Birx's book where she honestly owns the things she did wrong and her personal failingsi n her Covid role. It is more genuine than Esper's attempt at reputation preservation.)
    14 people found this helpful
    Report
  • Reviewed in the United States on May 20, 2022
    Format: KindleVerified Purchase
    Secretary Esper was a class mate of mine at West Point. I have always admired the principled leadership he brought to his service to our nation. It stands in stark contrast to that he describes of the administration for whom he served in as Secretary of Defense. What struck me as most admirable was how Mark was able to bring meaningful improvements to the the office in the short time he was there despite almost constant major distractions and fire fights abroad and at home. His description of the budgeting process he brought to our nations biggest line item of spending is an especially valuable lesson other areas of government should adopt. I hope it and the other improvements he initiated continue as a model going forward past his dismissal. We can all learn leadership lessons from the stories he describes and we are lucky to have had him in office for as long as he remained there.
    18 people found this helpful
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  • Reviewed in the United States on September 4, 2022
    Format: HardcoverVerified Purchase
    Unlike Bill Barr's self-serving, name-calling "book", which ended up in my trash, this book gives real insight on what it was like to be on the "Trump team." I am a middle-of-the-road Democrat (yes, there are a lot of us) and have nothing but praise for Esper and his allegiance to his sacred oath to the Consitution and not to a man. There is a lot of his views that didn't go down well with me, but all-in-all, when we needed a real patriot in important positions, Esper lived up to the test. The book is well-written, but rather long. And, he really needed to tone down the patting himself on the back somewhat. The book deserves its place on the shelf of American history.
    18 people found this helpful
    Report

Top reviews from other countries

  • conjunction
    5.0 out of 5 stars For this Limey, Well Worth the Effort
    Reviewed in the United Kingdom on May 22, 2022
    Format: KindleVerified Purchase
    I am 72 years old, British, and I don’t think I have ever voted Tory in my life. I have nearly always voted Labour. So you might think why am I reading the memoirs of Mark Esper, a loyal Republican who for 18 months up until being fired by Trump just after his election defeat was Secretary of Defense, ie the guy in charge of the Pentagon, in charge of the entire US military.

    I read it because a review I read in the Guardian suggested it offered a better perspective on Trump than other books exposing the goings on in the White House because of Esper’s integrity and how his commitment to the apolitical nature of his post, running the military meant that his loyalty was to the American Constitution and not necessarily the President.

    In fact most of this book is not really about Trump at all but about what he considers he achieved in terms of maintaining and reordering the US military, and his reasons for his actions. Also like one or two other books about US politics and history I have read over the years it offers a very clear understanding of the structure of US government especially the relations with the Chairman of the Chief of (military) Staffs, with the State Department, the National Security Council and so on. However compared to other books I have read you feel Esper is writing for an American audience who would naturally already have a basic understanding of these things, he doesn’t spell it all out.

    Of course as an English person there are a lot of things I don’t understand about contemporary US politics, especially the breakdown of bipartisan politics and Esper doesn’t go into the political scene in general. This is strictly a personal memoir about the role of the Department of Defense, and his role as Secretary, and his relationship with Trump and Trump’s henchmen especially Robert O’Brien and Mark Meadows. Interestingly Mike Pompeo and especially Bill Barr come out pretty well here. And Bolton too.

    The book offers a very clear picture of how Trump would often be reasonable and charming and without warning lurch into red-faced anger in which he would ignore a series of policies he had recently agreed with, and that had been worked out laboriously in conjunction with several US Departments of government. At other times he could be thoughtful and constructive, but sometimes it seemed to be all about his own position, especially as the election approached. And as we know, he hasn’t gone away yet.

    The most important areas of conflict between Esper and Trump were around Trump abrogating proper procedure and trying to get decisions made about committing the US military to a variety of actions at home and abroad without any proper planning or consideration of the consequences. Esper worked very hard with certain colleagues to gently get Trump to consider other options and this in itself was a fulltime job. The biggest issues in terms of difficulty were the responses to the disturbances over the murder of George Floyd and the increasing craziness in the White House in the run up and the immediate aftermath of the 2020 election. Esper was fired by Trump a few days after the election. Esper restricts his comments to the period he was Secretary for Defense, (and before that Secretary of the Army), so he doesn't comment on the storming of the Capitol, he restricts his comments of that of which he knows.

    The book is not difficult to read except in that there is a lot of detail about all the matters he had to consider so for a Limey it takes some concentration, but for this Limey it was well worth the effort.
  • Amazon Customer
    5.0 out of 5 stars The work behind the position!!
    Reviewed in Canada on June 14, 2022
    i was fascinated with this book. I am so in awe of what a Secretary of Defense must know and execute daily. What a job!! Made all the more difficult with Trump as the President. This theme is not , however, the overriding story in the book. It tells the reader how precarious government and democracy is in this day and age and if the right people are not in the right positions how the world could be in trouble. An excellent read.