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The Know-It-All: One Man's Humble Quest to Become the Smartest Person in the World Paperback – October 10, 2005

4.3 out of 5 stars 687 ratings

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Part memoir and part education (or lack thereof), The Know-It-All chronicles NPR contributor A.J. Jacobs's hilarious, enlightening, and seemingly impossible quest to read the Encyclopaedia Britannica from A to Z.

33,000 PAGES
44 MILLION WORDS
10 BILLION YEARS OF HISTORY
1 OBSESSED MAN

To fill the ever-widening gaps in his Ivy League education, A.J. Jacobs sets for himself the daunting task of reading all thirty-two volumes of the
Encyclopaedia Britannica. His wife, Julie, tells him it's a waste of time, his friends believe he is losing his mind, and his father, a brilliant attorney who had once attempted the same feat and quit somewhere around Borneo, is encouraging but unconvinced.

With self-deprecating wit and a disarming frankness,
The Know-It-All recounts the unexpected and comically disruptive effects Operation Encyclopedia has on every part of Jacobs's life -- from his newly minted marriage to his complicated relationship with his father and the rest of his charmingly eccentric New York family to his day job as an editor at Esquire. Jacobs's project tests the outer limits of his stamina and forces him to explore the real meaning of intelligence as he endeavors to join Mensa, win a spot on Jeopardy!, and absorb 33,000 pages of learning. On his journey he stumbles upon some of the strangest, funniest, and most profound facts about every topic under the sun, all while battling fatigue, ridicule, and the paralyzing fear that attends his first real-life responsibility -- the impending birth of his first child.

The Know-It-All is an ingenious, mightily entertaining memoir of one man's intellect, neuroses, and obsessions, and a struggle between the all-consuming quest for factual knowledge and the undeniable gift of hard-won wisdom.
"All the Little Raindrops: A Novel" by Mia Sheridan for $10.39
The chilling story of the abduction of two teenagers, their escape, and the dark secrets that, years later, bring them back to the scene of the crime. | Learn more

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Editorial Reviews

Review

"The Know-It-All is a hilarious book and quite an impressive achievement. I've always said, why doesn't someone put out a less complete version of the encyclopedia? Well done, A.J." —Jon Stewart, host of The Daily Show

"Tender....Entertaining....This book really does seek a working definition of what it means to be smart."
—Janet Maslin, The New York Times

"A.J. Jacobs turns the act of reading the entire Britannica into a hilarious memoir....It's the stunt of the book itself that allows the funny, touching memoir to be so stuffed with nutritious bits of trivia that you feel smart for reading it."
—Joel Stein, Time


"
The Know-It-All is funny, original, and strangely heroic. I found myself rooting on Jacobs's quixotic, totally endearing quest."—Jonathan Safran Foer, author of Everything Is Illuminated

About the Author

A.J. Jacobs is the author of Thanks a Thousand, It’s All Relative, Drop Dead Healthy, and the New York Times bestsellers The Know-It-All, The Year of Living Biblically, and My Life as an Experiment. He is a contributor to NPR, and has written for The New York Times, The Washington Post, and Entertainment Weekly. He lives in New York City with his wife and kids. Visit him at AJJacobs.com and follow him on Twitter @ajjacobs.

Product details

  • Publisher ‏ : ‎ Simon & Schuster
  • Publication date ‏ : ‎ October 10, 2005
  • Edition ‏ : ‎ Reprint
  • Language ‏ : ‎ English
  • Print length ‏ : ‎ 400 pages
  • ISBN-10 ‏ : ‎ 0743250621
  • ISBN-13 ‏ : ‎ 978-0743250627
  • Item Weight ‏ : ‎ 12.8 ounces
  • Dimensions ‏ : ‎ 5.5 x 1 x 8.44 inches
  • Best Sellers Rank: #189,697 in Books (See Top 100 in Books)
  • Customer Reviews:
    4.3 out of 5 stars 687 ratings

About the author

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A. J. Jacobs
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A.J. Jacobs is an author, journalist, lecturer and human guinea pig. He has written four New York Times bestsellers that combine memoir, science, humor and a dash of self-help. Among his books are The Know-It-All, The Year of Living Biblically, and Thanks a Thousand, in which he travels the globe to thank everyone who had even the slightest role in making his morning cup of coffee. He is a contributor to NPR, The New York Times, and Esquire, among others. He has given several TED talks, including ones about living biblically, creating a one-world family, and living healthily that have amassed over 10 million views. His upcoming book from Crown is called "The Puzzler: One Man's Quest to Solve the Most Baffling Puzzles Ever, From Crosswords to Jigsaws to the Meaning of Life."

Customer reviews

4.3 out of 5 stars
687 global ratings

Customers say

Customers find the book highly readable and entertaining, with a clever narrative style and impressive writing skills. They appreciate its educational value, being full of knowledge and interesting facts, and enjoy its humor, particularly how it pokes fun at fluff. The pacing receives mixed reactions, with some finding it tedious.

68 customers mention "Humor"66 positive2 negative

Customers find the book humorous, with many noting laugh-out-loud moments throughout. One customer describes it as a hilarious fact-filled journey, while another compares it to a literary sitcom.

"...Snarky, sweet, funny, (I had to look him up in Wikipedia to see if he finally had a child, I just had to know) Another reviewer said he thought..." Read more

"Hilarious! What a mind!!" Read more

"...Author offers both humorous and profound insights as he works through 22 volumes, 33 thousand pages in his attempt to absorb the entire corpus of..." Read more

"'The Know-it-all' by A.J. Jacobs is super humorous and witty while packing in loads of information, knowledge and facts about the world we live in,..." Read more

58 customers mention "Enjoyment"51 positive7 negative

Customers find the book entertaining and engaging, describing it as a worthwhile and enjoyable light read.

"...The Know-It-All is an interesting and funny peek into the life of a man who wants to make himself smarter...." Read more

"I'm enjoying this book so far, and I'm only to "E." It's a fun read, and I've already learned some trivia that I've felt compelled to share with..." Read more

"...before this one but was still an interesting read especially if you are into finding out lots of interesting facts." Read more

"Highly recommend this book! Both entertaining and informative. I always enjoy books by A.J.Jacobs, and this one didn't disappoint...." Read more

41 customers mention "Educational value"39 positive2 negative

Customers find the book educational, being full of knowledge and insight, with one customer noting it's a light read filled with trivia.

"Highly recommend this book! Both entertaining and informative. I always enjoy books by A.J.Jacobs, and this one didn't disappoint...." Read more

"I love reading A. J. Jacobs books. They are thoughtful, insightful and often very funny...plus I learn things...." Read more

"...It is humorous, enlightening, and fun. If you are a trivia or reference book enthusiast than this is your comfort reading!..." Read more

"...- A to Z - from Britannica that he found interesting, disturbing, educational, or just plain random...." Read more

23 customers mention "Information content"20 positive3 negative

Customers find the book's content engaging, with interesting facts and random tidbits throughout. One customer notes how the author balances various topics, while another describes it as an entertaining mix of memoir and trivia.

"...Learned a lot of interesting facts, by the way :)" Read more

"Enjoyed reading very funny and a lot of information. I liked how it was written. As a story instead of just facts." Read more

"...Although there is some interesting trivia, most of the book revolves around an incompetent narcissist who is unable to tell the difference between..." Read more

"Love the style of the writing and the unusual facts!" Read more

13 customers mention "Narrative style"11 positive2 negative

Customers enjoy the narrative style of the book, with one customer noting how it is told from A to Z, while others appreciate its clever story and personal anecdotes.

"A very clever story. A man sets out to read the Encyclopedia Britannica. The author can be veryy proud of himself...." Read more

"...Nope. It's a great story about a guy struggling to read it and all of the silly stuff that happens to him along the way...." Read more

"...was a fun read from start to finish, A J's quest was filled with great side stories and funny things that you know he really did to complete his..." Read more

"...Recommended for lovers of knowledge, memiors, and offbeat stories." Read more

12 customers mention "Writing style"12 positive0 negative

Customers appreciate the writing style of the book, describing it as great and witty, with one customer noting the author's impressive skills.

"AJ Jacobs is a phenomenal writer." Read more

"...He is a funny and witty writer and I look forward to more of his books." Read more

"GREAT WRITING" Read more

"...It's clever and well-written, but I found him too self-absorbed. He reminds me of a bookish Woody Allen." Read more

10 customers mention "Readability"8 positive2 negative

Customers find the book highly readable, with one mentioning that the author writes like a good stand-up comic.

"...It is informative, but written a such a way that it is not only an easy read, but I laughed so many times...." Read more

"A good quick read. It's a bit disjointed, but that's how reading the encyclopedia would be as well...." Read more

"...(where he attempts to become the healthiest human ever in a highly readable and engaging fashion)..." Read more

"...to what you may have heard about this book, it's not a more readable summary of the Encyclopedia. It's riddled with editing errors..." Read more

19 customers mention "Pacing"12 positive7 negative

Customers have mixed opinions about the pacing of the book, with several finding it tedious, while one customer describes it as a light-hearted memoir.

"...weaving together facts, insights, philosophical ruminations and personal anecdotes so that the reader floats easily between the fascination of..." Read more

"...for good bathroom reading and I may skim the rest of it, but it is tedious and boring to go page by page. I'd rather read the encyclopedia myself." Read more

"...You have to like this guy. He is the kind of hero I like - Smart, humble, funny and real...." Read more

"...While told from A to Z, it is a generally light-hearted memoir of the pursuit of reading the encyclopedia and exploring intelligence and how it..." Read more

Top reviews from the United States

  • Reviewed in the United States on January 10, 2008
    This is one of the funniest, most enjoyable books I've read in some time. He dedicates each chapter to a separate letter of the alphabet, listing many fascinating facts about all facets of life he's learned along with various experiences in his life during his quest to read all 34,000 plus pages of the Encyclopedia (including trying to impregnate his wife, meeting the man with the world's highest IQ, his quest to be on Jeopardy and Who Wants to be a Millionaire as well as his tour of the Brittanica's Chicago office).

    For some reason, my favorite line was his comment while discussing Freud:

    "I've never been a big fan of Freud's. I think I know why - if I may indulge in a little self-analysis. When I first read Freud's theories, I was a freshman in high school, and I wasn't having an awful lot of sex. By which I mean no sex at all. So the idea that sex was the driving force in human behavior just increased my already dangerous level of frustration. It was like a color-blind person reading that the meaning of life lay in the joys of multihued flowers."

    That last sentence cracked me up. Anyway, there are very few books that are such a pleasure to read while simultaneously giving the reader the feeling of learning quite a bit. For example, I learned the following:

    1) the nursery rhyme: "Jack and Jill" is actually an extended allegory about Charles I's attempt to raise taxes. The jack and the jill were weight measurements with the Jill being twice the jack. Charles wanted to water down the Jack (causing the Jill to come "tumbling after"). So the next time you hear that nursery rhyme, think confiscatory taxes.
    2) The Kamchatka people believe that dreams demand fulfillment, and Jacobs quotes the Brittanica: "Among some natives of Kamchatka a man need only dream of a girl's favour for her to owe him her sexual favors." (He also describes the downside to this rite when a man dreamt ten of his friends fell through a hole in the ice. His friends dutifully dove in but only 9 emerged.).
    3) Salieri was actually a fan and good friend of Mozart. Their supposed rivalry came from Rimsky-Korsakov's fictitious opera "Mozart et Salieri".
    4) Why does time seem to speed up as you age? According to the Brittanica: "elderly people find time shorter because they notice long-accustomed changes less frequently."

    The author is very self-deprecating and funny page after page. Anyway, I highly recommend the book. It's the kind of book I'll re-read as soon as I'm ready for another light read.
    3 people found this helpful
    Report
  • Reviewed in the United States on August 4, 2013
    Format: PaperbackVerified Purchase
    Napoleon Bonaparte was an avid ice skater.

    "Wicked Bibles" were published in Britain in 1631, which neglected to include the word "not" in Exodus 20:14, thus creating the commandment "Thou shalt commit adultery."

    Ancient Egyptians used geese as guard animals.

    Did those three factual tidbits entertain you? Does the prospect of reading 400 pages of similar fare interspersed with some memoir-ish reflections and anecdotes appeal to you? If your answers are in the affirmative then you will probably enjoy The Know-It-All by A.J. Jacobs. The book chronicles Jacobs' attempt to read the complete Encyclopedia Britannica and his more-difficult task of keeping the reader interested during the whole affair. Jacobs' largely succeeds with the latter, and The Know-It-All is a worthwhile read to anyone looking for a light read instilled with plenty of trivia.

    The idea was sparked out of Jacobs' wish to reengage with his intellectual side, which had been languishing a bit due to his job as a magazine editor for the likes of Entertainment Weekly and Esquire. Jacobs has found his niche in the "stunt journalism" genre, as his other books include Drop Dead Healthy (where he attempts to become the healthiest human ever in a highly readable and engaging fashion) and The Year of Living Biblically (where he attempts to become the most Biblical human ever I guess, I haven't read that one yet). Reading the encyclopedia (when some skimming is inevitable) clearly is a bit pedestrian in comparison in terms of total commitment and strenuousness. Realizing this, Jacobs doesn't really focus much on the physical act of reading the volume, though he does mention several times that it is often incredibly boring and repetitive. Instead, the book is largely a vehicle for Jacobs to riff on some fun facts he encounters, pursue some semi-relevant intellectual activities like attending Mensa meetings and playing chess, and reflecting a bit on the nature of intelligence and knowledge with some more personal passages.

    The book is organized in a slightly unorthodox fashion. Every chapter covers a letter, and Jacobs recounts his efforts from a-ak (a genre of Korean court music) to Zywiec (a small town of 32,000 in Poland). Each chapter is further divided into individual entries, where Jacobs cultivates several usually fascinating factual morsels, such as the three that kicked off this review. There is never any drama regarding whether he will actually finish the book, which is appreciated given that he could really just have skimmed everything and we would be none the wiser. It's not like we the collective reading public were going to quiz him at the end or something. The format is mainly a success, as it still provides Jacobs with the freedom to tangentially relate particular entries to stories from his past or some of his scholarly field trips undertaken during his quest.

    Tackling the Britannica, and describing how one goes about such an endeavor, is something that could easily fail in the hands of the wrong writer. Thankfully, Jacobs does a pretty commendable job of maintaining interest. Like Drop Dead Healthy, Jacobs and his immediate family and friends are featured prominently and these segments that focus on the author's attempts to one-up his intellectual brother-in-law help keep the book from becoming a mere list of random trivia. The Mensa meetings, school visits, and chess games also break up the monotony, though some asides such as Jacobs' appearance on Who Wants to Be a Millionaire (the book was published in 2004 when the show had already passed any shreds of cultural relevance or importance) fell a bit flat. But overall Jacobs does an excellent job touring the reader through the highlights of the Britannica and the prose is snappy, light, and self-effacing, something he has likely perfected through a career in magazines. While the book is facetiously titled and Jacobs often makes light of his deteriorating levels of "useful" knowledge, he does let his more highbrow and Ivy League education show during some clever and legitimately funny sections. I felt that the book lost some steam near the end but that it was ultimately an engaging mix of memoir and trivia, in a very similar vein to Drop Dead Healthy, which I also recommend.

    In Sum

    If you are looking for some light reading and enjoy historical facts with some anecdotes and riffs on pop culture thrown in for good measure then you can certainly do worse than A.J. Jacobs' amusing and even sometimes witty The Know-It-All.

    7/10
    3 people found this helpful
    Report
  • Reviewed in the United States on October 3, 2025
    Format: PaperbackVerified Purchase
    Thank you. Great condition and fair price. I lent out my hardcover copy and never got it back!

Top reviews from other countries

  • Radha
    5.0 out of 5 stars AJ Jacobs
    Reviewed in India on September 30, 2018
    Format: PaperbackVerified Purchase
    I really, really enjoy reading the book.
  • LF
    5.0 out of 5 stars the best! keeps you laughing
    Reviewed in Canada on January 22, 2016
    Format: PaperbackVerified Purchase
    one of my favorite books. a great start to all of A.J Jacobs' books. don't hesitate.. and while you're at it just get all the other ones right away.. you'll love them that much.
  • Farah
    5.0 out of 5 stars SO good!
    Reviewed in the United Kingdom on March 28, 2017
    It's been a while since I've read a laugh-out-loud book, but this had me chuckling and giggling aloud so many times.
    I wondered how he could make reading about someone who read the Encyclopaedia Britannica even remotely interesting, but he manages to make it more than that.
    AND you get to learn little snippets of information you may not have known before.
    It's well-written and it's funny.
  • Camille Davey
    5.0 out of 5 stars No more Google for me, it Encyclopaedia Britannica all the way!
    Reviewed in Australia on November 28, 2014
    What a great read, I have to admit, I didn't realise I had no idea it would be so humorous and insightful.
  • Judy
    4.0 out of 5 stars An interesting book
    Reviewed in the United Kingdom on June 5, 2013
    I enjoyed the book, it almost made me want an EB, funny and humanly written. Slightly OCD in places but once you realise thats how AJ is its amusing. I love his wife.