Logic Puzzle Book for Adults Volume 1: 50 Easy to Hard Logic Grid Puzzles – The Real Brain Challenge Feline Puzzles, Press
Sudoku Book for Adults – Large Print: Sudoku Puzzle Book with Solutions – The Perfect Challenge for All Skill Levels Kimokotoo, Publishing
The Ultimate Logic Grid Puzzle Book for Adults, Volume 3: 100 Fun and Extra Challenging Puzzles for Advanced Solvers (Logic Puzzles – The Ultimate Collection) Unicorn Books
Math & Logic Problems for Beginners & Seasoned Puzzle Solvers – 8 Pack [Paperback] Penny Press/Dell Magazines Dell Puzzle Books