Brain Games – Unsolved Cases: More Than 160 Puzzles about Crime and Detection Brain Games, Publications International Ltd.
Brain Games – 3-In-1: Word Search, Crosswords & Sudoku (256 Pages) Brain Games, Publications International Ltd.
Logic Grid Puzzles, Volume 4: 50 Fiendishly Hard Puzzles (Logic Puzzles for Adults – Platinum Collection) Unicorn Books