50 books • 2 series
Valentine's Day Sudoku vol.8
Valentine's Day Sudoku vol.4
Valentine's Day Sudoku vol.3
Valentine's Day Sudoku vol.7
The Amazing Sudoku 1000+ Puzzles vol.3
125+ Sudoku Legacy Puzzles vol.3
500+ Sudoku Classic vol.3
Take a Break! 300+ Sudoku Puzzles vol.4
Sudoku. 300+ Puzzles vol.2
Sudoku. Just solve it! #2
1000+ Sudoku Classic vol.2
The Amazing Sudoku 125+ Puzzles vol.2
Take a Break! 500+ Sudoku Puzzles vol.3
125+ Sudoku Paradise vol.2
300+ Sudoku Legacy Puzzles vol.2
500+ Sudoku Puzzles vol.16
Take a Break! 300+ Sudoku Puzzles vol.2
Sudoku. Just solve it! #1
Sudoku. 1000+ Puzzles vol. 1
The Amazing Sudoku 500+ Puzzles vol.1
300+ Sudoku Classic vol.1
500+ Sudoku Legacy Puzzles vol.1 (Sudoku Legacy, #1)
Take a Break! 125+ Sudoku Puzzles vol.1
500+ Sudoku Paradise vol.1
