Description: "An incredible debut thriller where the past can be changed to save the future." - Don Winslow, #1 internationally bestselling author "The Time Machine meets The DaVinci Code." - Chris Hammer, #1 international bestselling author "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, #1 internationally bestselling author of Falling and Drowning: The Rescue of Flight 1421 "A fascinating alternative history with an intriguing 'what if' at its core." - Dervla Mctiernan, #1 internationally bestselling author "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, #1 Internationally bestselling author "Croydon proves himself a clever reinterpreter of history... This pays tribute to Turing's genius and serves as a thoughtful meditation on power, secrecy, and sacrifice in times of conflict." - Publishers Weekly

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