- Travel Sudoku Puzzle Book for Women: Tour Friendly & Perfect for Purse Briefcase or Bag, More than 200 Riddles from Easy to Hard
- Sudoku Activity Book Hard 320 Puzzles: Fun and brain exercises for Adluts, Smart gifts for Women & Men
- Hard Sudoku For Middle School Puzzles 16x16: Math riddles book for Teens, smart gifts for Boy & Girl, worksheet and answer key one puzzle per page
- Sudoku Activity Book Easy to Hard 600 Puzzles: Fun and brain exercises for Adluts, Smart gifts for Women & Men
- Huge Sudoku Puzzle Book 1600 Riddles from Very Easy to Hard: Brain Games for Kids and Adults, Educational Fun for the Whole Family






























