The Ultimate Activity Book for Intelligent Men: Tricky Brain Teasers, Mind Games and Logic Puzzle Book for Adults (Perfect Gift for Men) IQ Street
The Ultimate Activity Book for Smart Boys: Tricky Brain Teasers, Mind Games and Logic Puzzle Activities for Boys 8-12 (Activity Books for Kids) IQ Street
200 Stress-Relieving Sudoku Puzzles to Sharpen Your Mind: Presented by Maria Shriver, Patrick Schwarzenegger, and MOSH (Puzzle Books for Brain Health) Maria, MOSH, Patrick, Schwarzenegger, Shriver
Brain Games – Unsolved Cases: More Than 160 Puzzles about Crime and Detection Brain Games, Publications International Ltd.