158 books • 21 series
250 Hard to Very Hard Jigsaw Sudoku Puzzles 9x9 (Jigsaw Sudoku, #9)
250 Very Easy to Easy Jigsaw Sudoku Puzzles 9x9 (Jigsaw Sudoku, #8)
250 Medium Sudoku X Puzzles 9x9 (Sudoku X, #3)
250 Hard Jigsaw Sudoku Puzzles 9x9 (Jigsaw Sudoku, #4)
250 Easiest Jigsaw Sudoku Puzzles 9x9 (Jigsaw Sudoku, #1)
250 Medium to Hard Jigsaw Sudoku Puzzles 9x9 (Jigsaw Sudoku, #7)
250 Easy to Medium Jigsaw Sudoku Puzzles 9x9 (Jigsaw Sudoku, #6)
250 Hard to Very Hard Sudoku X Puzzles 9x9 (Sudoku X, #9)
250 Easy to Medium Calcudoku Puzzles 9x9 (Calcudoku, #6)
250 Very Hard Sudoku X Puzzles 9x9 (Sudoku X, #5)
250 Easy Jigsaw Sudoku Puzzles 9x9 (Jigsaw Sudoku, #2)
250 Medium Jigsaw Sudoku puzzles 9x9 (Jigsaw Sudoku, #3)
250 Very Easy to Easy Sudoku X Puzzles 9x9 (Sudoku X, #8)
250 Hard Sudoku X Puzzles 9x9 (Sudoku X, #4)
250 Easiest Sudoku X Puzzles 9x9 (Sudoku X, #1)
250 Very Hard Calcudoku Puzzles 9x9 (Calcudoku, #5)
250 Medium to Hard Sudoku X Puzzles 9x9 (Sudoku X, #7)
250 Medium to Hard Classic Sudoku Puzzles 9x9 (Classic Sudoku, #7)
250 Easy to Medium Classic Sudoku Puzzles 9x9 (Classic Sudoku, #6)
250 Very Easy to Easy Classic Sudoku Puzzles 9x9 (Classic Sudoku, #8)
250 Very Easy to Easy Straights Puzzles 9x9 (Straights, #8)
250 Hard to Very Hard Classic Sudoku Puzzles 9x9 (Classic Sudoku, #9)
250 Easy to Medium Sudoku X Puzzles 9x9 (Sudoku X, #6)
250 Medium to Hard Straights Puzzles 9x9 (Straights, #7)