KNYGA Dr Gareth Moore Alan Turing's Cryptic Codebreaker's Puzzle Book
KNYGA Gareth Moore Whodunnit Puzzle Book, 80 Cosy Crime Puzzles to Solve
KNYGA Gareth Moore Perfect Crime Puzzle Book, Over 90 Puzzling Cases to Solve
KNYGA Gareth Moore 5-Minute Brain Workout for Longevity, Puzzles to Boost Your Brain Power

