- Kakuro Puzzle Book for Adults: Cross Sums Math Logic Puzzles - 160 Puzzles - Volume 1
- Difficult Sudoku Book for Adults: 200 Very Hard Sudoku's for Advanced Players
- Sudoku Book Medium Difficulty: 200 Medium Difficulty Sudokus with Solutions
- Sudoku for Seniors: 100 Large Print Sudoku Puzzles for Seniors with Solutions - UK Edition
- Kakuro Puzzle Book for Adults: Cross Sums Math Logic Puzzles - 160 Puzzles - Volume 5





























