Gareth Moore (Author) Dr Gareth Moore is the internationally bestselling author of a wide range of brain-training and puzzle books for both children and adults, including The Mindfulness Puzzle Book , The Great British Puzzle Book , Stay Sharp! and The Ordnance Survey Puzzle Book . His books have sold millions of copies in the UK alone, and have been published in over thirty different languages. He is also the creator of online brain-training site BrainedUp.com, and runs the daily puzzle site PuzzleMix.com. Find him online at DrGarethMoore.com, on Twitter as @DrGarethMoore, and at YouTube.com/@DrGareth Laura Jayne Ayres (Author) Laura Jayne Ayres is a puzzle writer and researcher.

After studying Linguistics at the University of Cambridge, she worked as a playwright before joining Dr. Gareth Moore's puzzle team. Books that she has worked on include Hacked: The Cyber Crime Puzzle Book , The Great British Puzzle Book , The Perfect Crime Puzzle Book , The Nautical Puzzle Book and The Ordnance Survey Kids' Adventure Book .