List Price: $28.00 Details
Save: $8.09 (29%)
$3.99 delivery: Sep 27 - Oct 1
Fastest delivery: Sep 23 - 28
Only 1 left in stock - order soon.
As an alternative, the Kindle eBook is available now and can be read on any device with the free Kindle app. Want to listen? Try Audible.
$$19.91 () Includes selected options. Includes initial monthly payment and selected options. Details
Price
Subtotal
$$19.91
Subtotal
Initial payment breakdown
Shipping cost, delivery date, and order total (including tax) shown at checkout.
Your transaction is secure
We work hard to protect your security and privacy. Our payment security system encrypts your information during transmission. We don’t share your credit card details with third-party sellers, and we don’t sell your information to others. Learn more
Ships from and sold by ACORN BOOKS.
Return policy: Eligible for Return within 30 days of receipt
This item can be returned in its original condition for a full refund or replacement within 30 days of receipt. You may receive a partial or no refund on used, damaged or materially different returns.
1-Click ordering is not available for this item.
Get Fast, Free Shipping with Amazon Prime
FREE delivery:
Get free shipping
Free shipping within the U.S. when you order $25.00 of eligible items shipped by Amazon.
Or get faster shipping on this item starting at $5.99 . (Prices may vary for AK and HI.)
Learn more about free shipping
Friday, Sep 24 on orders over $25.00 shipped by Amazon. Details
Fastest delivery: Thursday, Sep 23
Order within 19 hrs and 9 mins
Details
Condition: Used: Good
Comment: Book is in good condition. Book cover may have minor to moderate wear. Book pages may have minor to moderate wear. May have minor to moderate highlighting/writing or dog ear pages. Bundled media may or may not be available. 100% satisfaction guaranteed. Ships directly from Amazon.
<Embed>
Other Sellers on Amazon
$19.95
+ $3.99 shipping
Sold by: PHIMARREM Enterprises LLC
Sold by: PHIMARREM Enterprises LLC
(317 ratings)
97% positive over last 12 months
Only 1 left in stock - order soon.
Shipping rates and Return policy
$29.95
& FREE Shipping. Details
Sold by: Invizo
Sold by: Invizo
(34 ratings)
97% positive over last 12 months
Only 1 left in stock - order soon.
Shipping rates and Return policy
$27.27
+ $12.15 shipping
Sold by: Cost-Cutters-R-US
Sold by: Cost-Cutters-R-US
(715 ratings)
90% positive over last 12 months
In stock.
Usually ships within 3 to 4 days.
Shipping rates and Return policy
Loading your book clubs
There was a problem loading your book clubs. Please try again.
Not in a club? Learn more
Amazon book clubs early access

Join or create book clubs

Choose books together

Track your books
Bring your club to Amazon Book Clubs, start a new book club and invite your friends to join, or find a club that’s right for you for free.
Flip to back Flip to front
Listen Playing... Paused   You're listening to a sample of the Audible audio edition.
Learn more

Follow the Author

Something went wrong. Please try your request again later.


The Power of When: Discover Your Chronotype--and the Best Time to Eat Lunch, Ask for a Raise, Have Sex, Write a Novel, Take Your Meds, and More Hardcover – September 13, 2016

4.3 out of 5 stars 984 ratings

Price
New from Used from
Kindle
Hardcover, September 13, 2016
$19.91
$19.91 $0.94
Great on Kindle
Great Experience. Great Value.
iphone with kindle app
Putting our best book forward
Each Great on Kindle book offers a great reading experience, at a better value than print to keep your wallet happy.

Explore your book, then jump right back to where you left off with Page Flip.

View high quality images that let you zoom in to take a closer look.

Enjoy features only possible in digital – start reading right away, carry your library with you, adjust the font, create shareable notes and highlights, and more.

Discover additional details about the events, people, and places in your book, with Wikipedia integration.

Get the free Kindle app: Link to the kindle app page Link to the kindle app page
Enjoy a great reading experience when you buy the Kindle edition of this book. Learn more about Great on Kindle, available in select categories.

Enhance your purchase


The Amazon Book Review
The Amazon Book Review
Book recommendations, author interviews, editors' picks, and more. Read it now.

Enter your mobile number or email address below and we'll send you a link to download the free Kindle App. Then you can start reading Kindle books on your smartphone, tablet, or computer - no Kindle device required.

  • Apple
    Apple
  • Android
    Android
  • Windows Phone
    Windows Phone
  • Click here to download from Amazon appstore
    Android

To get the free app, enter your mobile phone number.

kcpAppSendButton

Frequently bought together

  • The Power of When: Discover Your Chronotype--and the Best Time to Eat Lunch, Ask for a Raise, Have Sex, Write a Novel, Take Y
  • +
  • Good Night: The Sleep Doctor's 4-Week Program to Better Sleep and Better Health
  • +
  • The Sleep Doctor's Diet Plan: Lose Weight Through Better Sleep
Total price:
To see our price, add these items to your cart.
These items are shipped from and sold by different sellers.
Choose items to buy together.

Editorial Reviews

Review

"The Power of When prepares you to take full advantage of our adaptation to the rhythms of nature. After reading this book, your decision-making ability will forever be improved. This is a new horizon in our understanding of human behavior, and Michael Breus masterfully presents the science as a recipe for self-improvement."
David Perlmutter, MD, author of Grain Brain and Brain Maker

"Dr. Breus has succeeded in making the complex science of chronobiology accessible and engaging for all readers. Whether you're looking to improve your relationships, get a raise at work, or simply lead a more fulfilling life, The Power Of When is the guidebook you've been waiting for."―Mark Hyman, MD, Director, Cleveland Clinic Center for Functional Medicine

About the Author

Michael J. Breus, PhD, is a Clinical Psychologist and both a Diplomate of the American Board of Sleep Medicine and a Fellow of The American Academy of Sleep Medicine. Dr. Breus has been featured on The Dr. Oz Show more than 30 times and writes regularly for The Huffington Post, The Dr. Oz Blog, and Psychology Today. He is the author of The Sleep Doctor's Diet Plan and Beauty Sleep.

Nolyn: The Rise and Fall, Book 1
In the depths of an unforgiving jungle, a legend is about to be born. Listen now

Product details

  • Publisher ‏ : ‎ Little, Brown Spark; Large Print Edition. (September 13, 2016)
  • Language ‏ : ‎ English
  • Hardcover ‏ : ‎ 384 pages
  • ISBN-10 ‏ : ‎ 0316391263
  • ISBN-13 ‏ : ‎ 978-0316391269
  • Item Weight ‏ : ‎ 1.55 pounds
  • Dimensions ‏ : ‎ 6.38 x 1.25 x 9.5 inches
  • Customer Reviews:
    4.3 out of 5 stars 984 ratings

Customer reviews

4.3 out of 5 stars
4.3 out of 5
984 global ratings
How are ratings calculated?

Top reviews from the United States

Reviewed in the United States on September 20, 2016
Verified Purchase
532 people found this helpful
Report abuse
Reviewed in the United States on April 26, 2017
Verified Purchase
132 people found this helpful
Report abuse

Top reviews from other countries

Susan Avery
3.0 out of 5 stars only for 9 to 5
Reviewed in the United Kingdom on June 12, 2020
Verified Purchase
21 people found this helpful
Report abuse
kg2500
3.0 out of 5 stars Interesting
Reviewed in the United Kingdom on February 15, 2017
Verified Purchase
20 people found this helpful
Report abuse
Amazon Customer
3.0 out of 5 stars Only needed about 20% of the book
Reviewed in the United Kingdom on April 19, 2019
Verified Purchase
7 people found this helpful
Report abuse
annaoj
5.0 out of 5 stars Nearly coffee time for me!
Reviewed in the United Kingdom on January 27, 2017
Verified Purchase
10 people found this helpful
Report abuse
DicktheBad
5.0 out of 5 stars So now I know!
Reviewed in the United Kingdom on July 23, 2017
Verified Purchase
6 people found this helpful
Report abuse