Dr Gareth Moore is the internationally bestselling author of a wide range of puzzle and brain-training books, with total sales in excess of 5 million copies worldwide. His books for adults include The Whodunnit Puzzle Book, Spydle, The Ordnance Survey Puzzle Book, The Mindfulness Puzzle Book, The Mammoth Book of New Sudoku, The Great British Puzzle Book and The Times Atlas of the World Puzzle Book, while his books for children include the million-selling Clever Kids series. He is also the creator of brain-training site BrainedUp.com, and runs the daily puzzle site PuzzleMix.com. 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.

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