394 books • 40 series
Sudoku X - 200 Hard to Very Hard Puzzles 9x9 vol.7 (Sudoku X, #7)
Sudoku X - 200 Easy to Normal Puzzles 9x9 vol.5 (Sudoku X, #5)
Non-Consecutive Sudoku - 200 Normal Puzzles 9x9 vol.2 (Non-Consecutive Sudoku, #2)
Non-Consecutive Sudoku - 200 Very Hard Puzzles 9x9 vol.4 (Non-Consecutive Sudoku, #4)
Sudoku X Puzzles - 400 Easy to Very Hard Puzzles 9x9 vol.8 (Sudoku X, #8)
Sudoku X - 200 Very Hard Puzzles 9x9 vol.4 (Sudoku X, #4)
Sudoku X - 200 Hard Puzzles 9x9 vol.3 (Sudoku X, #3)
Non-Consecutive Sudoku - 200 Easy Puzzles 9x9 vol.1 (Non-Consecutive Sudoku, #1)
Sudoku - 200 Easy to Normal Puzzles 9x9 vol.5 (Sudoku, #5)
Sudoku - 200 Hard to Very Hard Puzzles 9x9 vol.7 (Sudoku, #7)
Sudoku - 200 Easy Puzzles 9x9 vol.1 (Sudoku, #1)
Sudoku - 200 Normal Puzzles 9x9 vol.2 (Sudoku, #2)
Sudoku - 200 Normal to Hard Puzzles 9x9 vol.6 (Sudoku, #6)
Sudoku - 200 Hard Puzzles 9x9 vol.3 (Sudoku, #3)
Sudoku - 400 Easy to Very Hard Puzzles 9x9 vol.8 (Sudoku, #8)
Sudoku - 200 Very Hard Puzzles 9x9 vol.4 (Sudoku, #4)
Consecutive Sudoku - 400 Hard to Very Hard Puzzles 9x9 vol.8 (Consecutive Sudoku, #8)
Consecutive Sudoku - 200 Easy Puzzles 9x9 vol.1 (Consecutive Sudoku, #1)
Consecutive Sudoku - 200 Hard Puzzles 9x9 vol.3 (Consecutive Sudoku, #3)
Consecutive Sudoku - 200 Normal Puzzles 9x9 vol.2 (Consecutive Sudoku, #2)
Consecutive Sudoku - 200 Very Hard Puzzles 9x9 vol.4 (Consecutive Sudoku, #4)
Consecutive Sudoku - 200 Hard to Very Hard Puzzles 9x9 vol.6 (Consecutive Sudoku, #6)
Consecutive Sudoku - 200 Easy to Normal Puzzles 9x9 vol.5 (Consecutive Sudoku, #5)
Consecutive Sudoku - 400 Easy to Normal Puzzles 9x9 vol.7 (Consecutive Sudoku, #7)