- Samurai Sudoku: 500 Medium Sudoku Puzzles Overlapping into 100 Samurai Style (Logic Puzzles Series)
- Jigsaw Sudoku: 500 Medium to Very Hard
- The Giant Book of Kakuro: 1000 Hard Cross Sums Puzzles (8x8 – 9x9 – 10x10) (Adult Activity Books Series)
- Variety Sudoku Puzzle: 400 Easy to Hard Puzzles
- The Giant Book of Numbrix: 1000 Medium to Very Hard : (10x10) Puzzles (Adult Activity Books Series)






























