Big Book of Sudoku - Medium to Hard - 1000 Puzzles: Huge Bargain Collection of 1000 Puzzles and Solutions, Medium to Hard Level, Tons of Challenge for your Brain!

The Super Sudoku Book For Smart Kids: A Collection Of Over 200 Sudoku Puzzles Including 4x4's, 6x6's, 8x8's, and 9x9's That Range In Difficulty From Easy To Hard!

Brain Games - 2 Books in 1 - Sudoku (Large Print)

Brain Games - To Go - Sudoku Challenge

Brain Games - Relax and Solve: Sudoku (Purple)

Brain Games - Large Print Sudoku (Swirls)

Sudoku Puzzle Book for Adults: 600 Puzzles – Easy & Medium with Full Solutions

Sudoku Puzzles for Adults Large Print: A Book with Easy to Hard Sudoku for Seniors and Teens. Big Print-Two Puzzles per Page.

Pocket Puzzle Sudoku: Puzzles for Sharp Mind, Travel Sized (Brain Busters)

Logic Puzzles Book for Brain Fitness: 90-Day Challenge to Sharpen the Mind and Strengthen Cognitive Skills Enlarged Print, Easy to Hard! (Brain Fitness Puzzle Games)