About the Author

Eric Saunders is a prolific writer of non-fiction for children and adults, specialising in puzzle and activity books. He has been compiling puzzles for over 35 years, and his work can be found in books, newspapers and websites around the world. He lives in Wales.

Dermot Turing graduated from King's College Cambridge and New College Oxford. He is the nephew of Alan Turing, a former trustee of Bletchley Park and author of the latest biography on Turing (Prof: Alan Turing Decoded, published in 2015 by The History Press).