K, Wise Captain Sudoku for Experts: Sudoku Puzzles for Seasoned Puzzle Solvers 8.5x11 Inches, 302 Pages 240 Puzzles Across 9x9, 12x12 and 16x16 Grids. Best Form of Entertainment During Vacations and Free Times

Activity Books, CTW The Ultimate Activity Book for Boys: Fun and Challenging Puzzles for Smart Boys Large Print 8.5 x 11 inches Includes Word Search, Sudoku, Mazes, ... and Brain-Boosting Fun for Kids Ages

Publishing, JC Sudoku Masterpiece: 500 Puzzles from Easy to Hard: Boost Your Brain Power with Progressive Sudoku Challenges Relaxing to Expert-Level Puzzles for ... 8.5x11 inches, 198 Pages 500 Puzzles ...

Puzzler, Johny J. CIRCLE MAZE BOOK HARD MAZES FOR EXPERT SOLVERS: 200 Pages 100 Mazes + Solutions Maze Puzzles Full 8.5 x 11 inch A Great Gift for Adults, Seniors & Teens

Holding, Don 300 Hard 16x16 Sudoku Puzzles: A Challenging Collection of 300 Hard 16x16 Sudoku Puzzles for Expert Solvers, 8.5x11in, 1 Puzzle per Page

K, Wise Captain 900 Sudoku For Teens, Adults & Seniors: Puzzles From Easy To Hard 8.5x11 inches, 228 pages Mind-Boosting Number Game. Just the Right Activity For You And Your Loved Ones

K, Wise Captain Sudoku For Young and Adults: Sudoku 8.5x11 Inches, 282 Pages 240 Puzzles of Various Grid Sizes from Easy to Hard. A Great Gift for Vacations, Holidays and Free Times