Celebrate Small Business Month with our most popular business-only savings Shop Savings Guide>
Kindle Unlimited
Unlimited reading. Over 4 million titles. Learn more
Read for Free
OR
$5.99 with 57 percent savings
Print List Price: $13.99

Promotions apply when you purchase

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.

Sold by Amazon.com Services LLC.
Read with our free app
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
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.

Read instantly on your browser with Kindle for Web.

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

QR code to download the Kindle App

Follow the author

John Winton
Follow
Something went wrong. Please try your request again later.

Ultra in the Pacific: How Breaking Japanese Codes and Ciphers Affected Naval Operations Against Japan, 1941-45 (The Secret War) Kindle Edition

by John Winton (Author) Format: Kindle Edition
4.3 out of 5 stars 369 ratings
An astounding assessment of the invaluable role of U.S. and Allied codebreakers in the sprawling naval war against Japan.

Essential reading for fans of Liza Mundy, Ian W. Toll, and James D. Hornfischer.

How did the allies intercept, decipher, and analyse Japanese secret messages through the course of World War Two? And perhaps more importantly, how were they able to use the information they gathered without highlighting to the Japanese that their codes had been cracked?

John Winton has skillfully used a wealth of previously top secret American and British sources to craft an astounding history of intelligence and espionage in the Pacific War.

He uncovers the key role played by codebreakers in the naval stand-off at Coral Sea and the showdown at Midway; how cryptanalysis affected the Guadalcanal campaign and set up the airborne assassination of Admiral Yamoto; ULTRA’s importance in giving the US foreknowledge of Japanese operations in the Solomons and made Allied submarines such a deadly threat to enemy shipping.

‘an illuminating view of a fascinating topic.’ Naval War College Review

‘a very well-written general account of Allied radio intelligence operations directed against the Imperial Japanese Navy throughout World War II.’ The Journal of Asian Studies

‘[Winton] is a comfortable writer who moves skillfully through the essential facts of each case study, integrating the operational elements with signals intelligence. Significantly, he includes other linked intelligence operations’ The Journal of Military History
Read more
Previous slide of product details
  1. Part of series
    The Secret War
  2. Print length
    346 pages
  3. Language
    English
  4. Accessibility
    Learn more
  5. Publication date
    May 15, 2022
  6. File size
    1.7 MB
  7. Page Flip
    Enabled
  8. Word Wise
    Enabled
  9. Enhanced typesetting
    Enabled
Next slide of product details
Unwell Hydration from Alex Cooper
Hydrate & focus with every sip Shop now

Shop this series

 See full series
There are 3 books in this series.
This option includes 3 books.
  • Kindle Price:
    $17.97
    By placing your order, you're purchasing a license to the content and you agree to the Kindle Store Terms of Use.

Customers also bought or read

Page 1 of 1Start overPage 1 of 1
Previous page
  11. Whirlwind: War in the Pacific
    Kindle Edition
    $3.99
  26. Defeat in the West
    Kindle Edition
    $0.99
Next page
Loading...

Product details

  • ASIN ‏ : ‎ B09SG83XQG
  • Publisher ‏ : ‎ Sapere Books
  • Accessibility ‏ : ‎ Learn more
  • Publication date ‏ : ‎ May 15, 2022
  • Language ‏ : ‎ English
  • File size ‏ : ‎ 1.7 MB
  • Simultaneous device usage ‏ : ‎ Unlimited
  • Screen Reader ‏ : ‎ Supported
  • Enhanced typesetting ‏ : ‎ Enabled
  • X-Ray ‏ : ‎ Enabled
  • Word Wise ‏ : ‎ Enabled
  • Print length ‏ : ‎ 346 pages
  • ISBN-13 ‏ : ‎ 978-1800554986
  • Page Flip ‏ : ‎ Enabled
  • Part of series ‏ : ‎ The Secret War
  • Customer Reviews:
    4.3 out of 5 stars 369 ratings

About the author

Follow authors to get new release updates, plus improved recommendations.
John Winton

John Winton

Brief content visible, double tap to read full content.
Full content visible, double tap to read brief content.

Discover more of the author’s books, see similar authors, read book recommendations and more.

Customer reviews

4.3 out of 5 stars
369 global ratings

Review this product

Share your thoughts with other customers
Write a customer review

Top reviews from the United States

  • Kindle Customer
    5.0 out of 5 stars The poweful roll of Communications Intelligence in the PTO during WWII.
    Reviewed in the United States on September 9, 2022
    Verified Purchase
    This carefully documented history of the role communications intelligence, particularly ULTRA played in the prosecution of the Pacific war is detailed and compelling. The skills of our decription services are a powerful testimonial to their dedication, their imagination, and their tenacity. When stakes were incredibly high they found the determination an courage, sometimes in the face of skepticism and even disdain, to persist. Anyone interested in understanding the War in the Pacific will find this history compelling.
    Helpful
     Report
  • steve wheat
    4.0 out of 5 stars More detailed information required. Disappointed overall.
    Reviewed in the United States on October 31, 2022
    Verified Purchase
    I was looking for the small story about how these Japanese codes were figured out. The men and women, their background, intuition and lucky breaks made, what it took to crack the codes. Details pretty much lacking. I know that can be boring stuff, but that is what I was after and "Ultra in the Pacific" didn't deliver on. The book covers how the information was used and by whom and the results. This is done very well through out the book.
    3 people found this helpful
    Helpful
     Report
  • Kindle Customer
    5.0 out of 5 stars very inspiring book
    Reviewed in the United States on December 28, 2023
    Verified Purchase
    The book is very well written and has historical significance and value. I could not put it down, I highly recommend it. Ultra saved a great many lives, no question about that.
    One person found this helpful
    Helpful
     Report
  • Robert
    5.0 out of 5 stars Behind the Scenes is Critical
    Reviewed in the United States on April 20, 2024
    Verified Purchase
    Losses are minimized when you know what the enemy is planning, so important.
    Helpful
     Report
  • Kindle Customer
    4.0 out of 5 stars Brit author should have used American English
    Reviewed in the United States on May 26, 2022
    Verified Purchase
    Quite a bit of Ultra information made for interesting reading. I did not like Winton’s use of British English; it was distracting. However, he fully and interestingly explained the importance of how the US Navy broke every Japanese code and ensuing changes.
    Helpful
     Report
  • Andy
    3.0 out of 5 stars Too much detail.
    Reviewed in the United States on October 20, 2022
    Verified Purchase
    Amazed by the ability of the US to break the Japanese codes. Was not aware of how effective this was. I think it played a huge part in winning the war.
    Helpful
     Report
  • Bernie Diaz
    5.0 out of 5 stars A complete history summary of WW2 in the Pacific
    Reviewed in the United States on October 3, 2023
    Verified Purchase
    I enjoy history and this book provided detailed accounts of the major sea battles in the Pacific and the chronological events until the surrender of Japan.
    Helpful
     Report
  • Kindle Customer
    5.0 out of 5 stars Ultra in the pacific
    Reviewed in the United States on November 28, 2022
    Verified Purchase
    A very informative book with a lot of information that I'd never heard about before well worth the read and I plan on eventually getting a hard copy for my library
    Helpful
     Report

Top reviews from other countries

  • Brian
    5.0 out of 5 stars ULTRA
    Reviewed in the United Kingdom on May 18, 2022
    Verified Purchase
    The book required a degree of determination to finish..not because of the text but because it was very, very hard to put down! If I had a minor complaint it would be the occasional hint that the UK did not pull their weight but I suspect that the US forces did not realise how much battle was done by the UK before America joined the fight.
    Report
  • Tony G.
    4.0 out of 5 stars Ultra in the Pacific
    Reviewed in the United Kingdom on March 21, 2024
    Verified Purchase
    It's strange how in the European theatre ULTRA was not to be mentioned but in the Pacific it was common. No mention in the book that the Brits gave US radar, Hedgehog mortars and other war-winning material. Par for the course, sadly.
    Report
  • Gaarghoile
    5.0 out of 5 stars It makes you wonder if someone or some full organisation was right on the inside track
    Reviewed in the United Kingdom on September 23, 2014
    Verified Purchase
    Some story the Japanese changing their codes and the Americans Canadians and British decoding and decyphering them almost as fast as they could be invented compiled and dissemminated It makes you wonder if someone or some full organisation was right on the inside track because no matter what the Japanese did the Allies had wind of it. The British had recruited Admiral Canaris who was The Head of The German Armys Intelligence which assisted the War effort no end I suspect that much of the conduct of the War in Europe was deliberately orchestrated by many influential and powerful German organisations after 1942-3. i would not be surprised if the same sort of highly organised subversion was not being orchestrated in Japan....
    Report
  • M. B. Barter
    5.0 out of 5 stars A Great book
    Reviewed in the United Kingdom on April 5, 2017
    Verified Purchase
    We hear a lot about how ULTRA helped defeat Nazi Germany.
    This book is an excellent account of how ULTRA helped defeat the Japanese.
    Report

Report an issue


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