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.Together, they are the authors of Line of Duty Case Files: The Official Puzzle Book.