Buying Options

Unlimited reading. Over 2 million titles. Learn more
Read for Free
Kindle Price: $4.99

These promotions will be applied to this item:

Some promotions may be combined; others are not eligible to be combined with other offers. For details, please see the Terms & Conditions associated with these promotions.

You've subscribed to ! We will preorder your items within 24 hours of when they become available. When new books are released, we'll charge your default payment method for the lowest price available during the pre-order period.
Update your device or payment method, cancel individual pre-orders or your subscription at
Your Memberships & Subscriptions

Buy for others

Give as a gift or purchase for a team or group.
Learn more

Buying and sending eBooks to others

Select quantity
Buy and send eBooks
Recipients can read on any device

Additional gift options are available when buying one eBook at a time.  Learn more

These ebooks can only be redeemed by recipients in the US. Redemption links and eBooks cannot be resold.

Share <Embed>
Kindle app logo image

Download the free Kindle app and start reading Kindle books instantly on your smartphone, tablet, or computer - no Kindle device required. Learn more

Read instantly on your browser with Kindle Cloud Reader.

Using your mobile phone camera - scan the code below and download the Kindle app.

QR code to download the Kindle App

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.
Sleeper Protocol (The Protocol War Book 1) by [Kevin Ikenberry]

Follow the Author

Something went wrong. Please try your request again later.

Sleeper Protocol (The Protocol War Book 1) Kindle Edition

4.7 out of 5 stars 25 ratings

New from Used from

Books In This Series (1 Books)
Complete Series
The Protocol War
Kindle Edition

Editorial Reviews


Finalist for the 2017 Colorado Book Award for Science Fiction
" emotionally powerful debut. [Ikenberry's] insight to the human side of the military mind has strong appeal." ~
Publisher's Weekly

From the Author

This is a re-release of the original edition from 2016. If you recognized the title - you're not hallucinating, I promise! Now with a new publisher, we corrected a few small errors and put new covers on the books. If you purchased this book during its first life, thank you very much. Would you consider leaving a new review? I'd greatly appreciate it. If you're brand new to this book, welcome!

Product details

  • ASIN ‏ : ‎ B0B9WGHFV2
  • Publisher ‏ : ‎ Theogony Books (August 16, 2022)
  • Publication date ‏ : ‎ August 16, 2022
  • Language ‏ : ‎ English
  • File size ‏ : ‎ 2544 KB
  • Simultaneous device usage ‏ : ‎ Unlimited
  • Text-to-Speech ‏ : ‎ Enabled
  • Screen Reader ‏ : ‎ Supported
  • Enhanced typesetting ‏ : ‎ Enabled
  • X-Ray ‏ : ‎ Not Enabled
  • Word Wise ‏ : ‎ Enabled
  • Print length ‏ : ‎ 357 pages
  • Lending ‏ : ‎ Enabled
  • Customer Reviews:
    4.7 out of 5 stars 25 ratings

About the author

Follow authors to get new release updates, plus improved recommendations.
Brief content visible, double tap to read full content.
Full content visible, double tap to read brief content.

Kevin's head has been in the clouds since he was old enough to read. Ask him and he'll tell you that he still wants to be an astronaut. With over twenty five years of experience in space science education, including managing the U.S. Space Camp program and serving as an executive of two Challenger Learning Centers, Kevin continues to work with space every day. A retired Army armor and space operations officer, Kevin lives in Colorado with his family. His home is seldom a boring place.

Kevin is the international bestselling author of The Protocol War series featuring Colorado Book Award finalist SLEEPER PROTOCOL, which Publisher's Weekly called "an emotionally powerful debut." Kevin is also the author or co-author of ten bestselling Peacemaker novels in the Four Horsemen Universe and many more military science fiction and thriller novels. His alternate history novel THE CROSSING debuts in August 2022. His short fiction has appeared internationally across various publications and anthologies. Kevin regularly teaches classes for aspiring writers. He is a member of the International Association of Science Fiction and Fantasy Authors (IASFA), International Thriller Writers, and is a member of SIGMA, the science fiction think tank.

Kevin can be found online at

Customer reviews

4.7 out of 5 stars
4.7 out of 5
25 global ratings
5 star
4 star
3 star
2 star 0% (0%) 0%
1 star 0% (0%) 0%

Top reviews from the United States

Reviewed in the United States 🇺🇸 on August 31, 2022
Reviewed in the United States 🇺🇸 on September 14, 2022
Reviewed in the United States 🇺🇸 on August 19, 2022
One person found this helpful
Report abuse
Reviewed in the United States 🇺🇸 on August 19, 2022
Reviewed in the United States 🇺🇸 on August 23, 2022
Reviewed in the United States 🇺🇸 on August 19, 2022
3 people found this helpful
Report abuse
Reviewed in the United States 🇺🇸 on August 27, 2022
Reviewed in the United States 🇺🇸 on August 19, 2022
One person found this helpful
Report abuse
Report an issue

Does this item contain inappropriate content?
Do you believe that this item violates a copyright?
Does this item contain quality or formatting issues?