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Table of Contents
About The Book
If you had the power to change history, would you dare? For readers of Dan Brown, Matthew Reilly and Fiona McIntosh, The Turing Protocol blends historical fact with fiction to tell the extraordinary story of a machine that allows the user to send messages to the past - and may just save the future.
In the midst of World War II, Enigma codebreaker Alan Turing has created a machine named Nautilus that can send a message back into the recent past. After Turing uses it to help the Allied forces succeed on D-Day, he sees the power (and potential danger) of what he has created. He knows he can only entrust it to one person: Joan, the mother of his secret child.
Over the next seventy years, the Nautilus is passed down through the Turing family, who all must decide for themselves when to use this powerful invention. Will it save the world - or destroy it?
About The Author
Photograph © Sarah Hellen Photography
Nick Croydon was born in Surrey, England, and is the CEO of QBD Books Australia. He has more than twenty-five years’ experience running international publishing companies and book retail businesses across the United Kingdom and Australia. The Turing Protocol is his debut novel. Nick is a father of four and husband to Esther, and he and his family spend their time between Brisbane, Spain and the UK.
Product Details
- Publisher: Affirm Press (July 29, 2025)
- Length: 320 pages
- ISBN13: 9781923293991
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Raves and Reviews
‘What sets the book apart isn’t just its concept, but how it uses that concept to explore modern questions: the responsibility of technology, the moral grey zones of war, and the personal cost of carrying knowledge that could shift the future … Whether you’re into alternative WWII fiction, speculative thrillers, or just looking for a smart weekend read, this is one to check out.’
– Write Finance
‘I had a blast inside Croydon’s no-higher-stakes alt-20th-century playground. A wildly imaginative distortion of deeply researched historical fact forming a ripping tale of ‘past careens into present’ fiction. Urgent morse code message to my past self: READ THE TURING PROTOCOL NOW.’
– Trent Dalton
‘A remarkable debut novel from Nick Croydon. A smart, gripping thriller with an amazing big idea behind it. I loved it and I can’t wait for the movie and the sequel.’
– T.J. Newman
‘An incredible debut thriller where the past can be changed to save the future.’
– Don Winslow
‘A thought-provoking alternative history. The Time Machine meets The DaVinci Code.’
– Chris Hammer
‘Vivid, tense and sharp – Croydon’s concept will leave your mind and morals delightfully tangled.’
– Candice Fox
‘A fascinating alternative history with an intriguing ‘what if’ at its core. A great read.’
– Dervla McTiernan
‘An intriguing mix of extraordinary fact and tense fiction’
– Sunday Telegraph
'Absorbing romp.'
– Good Reading
'The Turing Protocol is as thought-provoking as it is entertaining.'
– Meredith Jaffe
Resources and Downloads
High Resolution Images
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Book Cover Image (jpg): The Turing Protocol
Trade Paperback 9781923293991
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Author Photo (jpg): Nick Croydon Photograph © Sarah Hellen Photography(0.1 MB)
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