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.