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 Murder Mystery Puzzle Book series, The Whodunnit Puzzle Book , Meowdle , The Fantasy Puzzle Book , The Ordnance Survey Puzzle Book , Anti-stress Puzzles and RHS Gardener's Quiz & Puzzle Book . His books have sold over a million copies in the UK alone and have sold in 35 different languages. He is also the creator of online 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 with Gareth include the successful The Murder Mystery Puzzle Book series , Spydle, 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 .