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Sinclair McKay
By the Author
50 Codes that Changed the World
A CUNNING CHRONICLE OF THE 50 CODES THAT ALTERED THE COURSE OF HISTORY AND CHANGED THE WORLD From the bestselling author of Bletchley Park Brainteasers…
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Secret Britain
Discover the stories of the brave men and women who worked, trained and fought across the UK, from Bletchley Park in southern England all the…
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The Tower of London Puzzle Book
If you cracked the GHCQ Puzzle Book and tore through the Ordnance Survey Puzzle Book, you must show off your brainteaser abilities with the newest…
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The Scotland Yard Puzzle Book
Pit your wits against the brilliant minds of Scotland Yard, from the bestselling author of Bletchley Park Brainteasers, Sinclair McKay. If you cracked the GCHQ…
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Secret Service Brainteasers
Sinclair McKay's Bletchley Park Brainteasers was the runaway quiz book bestseller of 2017, now it's time to pit your wits against the secret heroes of…
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Bletchley Park Brainteasers
Bestselling Bletchley Park Brainteasers continues to delight hundreds of thousands of devoted puzzlers with its fiendish puzzles, riddles and enigmas. It's never to late to…