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 author. She studied Linguistics at the University of Cambridge, and is a published playwright. Books that she has worked on include The Whodunnit Puzzle Book, Spydle, The Fantasy Puzzle Book, The British Museum Puzzle Book and 'Twas The Murder Before Christmas.

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