158 books • 21 series
Book #1: 1000 Hard Numbricks Puzzles 9x9
Book #2: 1000 Very Hard Numbricks Puzzles 9x9
Book #3: 1000 Hard Hidoku Puzzles 9x9
Book #4: 1000 Very Hard Hidoku Puzzles 9x9
Book #5: 1000 Hard Sudoku Puzzles 9x9
Book #11: 250 Easy Chain Sudoku Puzzles 6x6
Book #1: 250 Easiest Calcudoku Puzzles 9x9
Book #2: 250 Easy Calcudoku Puzzles 9x9
Book #3: 250 Medium Calcudoku Puzzles 9x9
Book #4: 250 Hard Calcudoku Puzzles 9x9
Book #5: 250 Very Hard Calcudoku Puzzles 9x9
Book #1: 250 Easy Chain Sudoku Puzzles 4x4
Book #2: 250 Medium Chain Sudoku Puzzles 4x4
Book #3: 250 Hard Chain Sudoku Puzzles 4x4
Book #2: 250 Easy Classic Sudoku Puzzles 9x9
Book #4: 250 Hard Classic Sudoku Puzzles 9x9
Book #1: 250 Easiest Hidoku Puzzles 9x9
Book #2: 250 Easy Hidoku Puzzles 9x9
Book #3: 250 Medium Hidoku Puzzles 9x9
Book #4: 250 Hard Hidoku Puzzles 9x9
Book #5: 250 Extreme Hidoku Puzzles 9x9
Book #1: Super Hidoku Puzzles Book 1
Book #2: 250 Easy Jigsaw Sudoku Puzzles 9x9
Book #3: 250 Medium Jigsaw Sudoku puzzles 9x9
Book #4: 250 Hard Jigsaw Sudoku Puzzles 9x9
Book #1: 61 Math Problem Search Puzzles 7x7
Book #1: 250 Easiest Numbricks Puzzles 9x9
Book #1: 250 Sehr Leicht Numbricks Ratsel 9x9
Book #2: 250 Easy Numbricks Puzzles 9x9
Book #3: 250 Medium Numbricks Puzzles 9x9
Book #4: 250 Hard Numbricks Puzzles 9x9
Book #1: Pokemon Word Search Puzzle
Book #1: 250 Easiest Straights Puzzles 9x9
Book #2: 250 Easy Straights Puzzles 9x9
Book #3: 250 Medium Straights Puzzles 9x9
Book #4: 250 Hard Straights Puzzles 9x9
Book #5: 250 Very Hard Straights Puzzles 9x9
Book #1: 250 Sudoku Puzzles 6x6 for Kids
Book #1: 250 Easiest Sudoku X Puzzles 9x9
Book #2: 250 Easy Sudoku X Puzzles 9x9
Book #3: 250 Medium Sudoku X Puzzles 9x9
Book #4: 250 Hard Sudoku X Puzzles 9x9
Book #5: 250 Very Hard Sudoku X Puzzles 9x9
Book #1: 250 Tetroid Puzzles 8x8
Book #2: 250 Tetroid Puzzles 9x9
Book #3: 250 Tetroid Puzzles 10x10
Book #4: 250 Tetroid Puzzles 8x9
Book #5: 250 Tetroid Puzzles 9x10
Book #1: 400 Variety Puzzle Books for Adults