The Ultimate Activity Book for Intelligent Men: Tricky Brain Teasers, Mind Games and Logic Puzzle Book for Adults (Perfect Gift for Men) IQ Street
Murdle Puzzle Series Collection 3 Books Set (Murdle, Murdle: More Killer Puzzles & Murdle: Even More Killer Puzzles) G. T. Karber
Sudoku Book for Adults and Seniors with 3 Levels of Difficulty: 402 Puzzles & Solutions, Easy to Hard (The Perfect Gift for Puzzle Lovers) (Gifts for Men & Women) Publishing, Rody