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
The Ultimate Logic Puzzle Book For Kids Ages 8 – 11: Screen-Free Entertainment with Brain Teasers and Logic Challenges to Improve Focus and Boost Your Child’s Confidence through Problem Solving Lulu The Unicorn, Publishing
Train Your Brain Logic Games and Puzzles Activity Book for Teens: 130+ brain teasers including sudoku, cryptograms, crosswords, wordsearch, riddles and more Publishing, Smiling Turtle