215 books • 12 series
Book #1: 250 Easy Straights 7x7
Book #1: 250 Hashiwokakero 6x6 Puzzles
Book #1: 250 Easy Jigsaw Sudoku 6x6
Book #2: 250 Medium Straights 7x7
Book #2: 250 Medium Jigsaw Sudoku 6x6
Book #18: Classic Sudoku
Book #1: 250 Numbricks 4x4 easy puzzles
Book #2: 250 Numbricks 4x4 medium puzzles
Book #3: 250 Numbricks 4x4 hard puzzles
Book #2: Sudoku for Kids 150 Easy Sudoku 4x4
Book #1: 400 Sudoku Easy Sudoku 6x6
Book #2: 400 Sudoku Medium Sudoku 6x6
Book #3: 400 Sudoku Hard Sudoku 6x6
Book #4: 400 Sudoku Easy to Medium Sudoku 6x6
Book #5: 400 Sudoku Medium to Hard Sudoku 6x6
Book #3: 101 Hard Samurai Sudoku Puzzles
Book #6: 120 Easy Samurai Sudoku Puzzles
Book #7: 120 Medium Samurai Sudoku Puzzles
Book #1: 400 Variety Sudoku Puzzle Book 1
Book #2: 400 Variety Sudoku Puzzle Book 2
Book #3: 400 Variety Sudoku Puzzle Book 3
Book #4: 400 Variety Sudoku Puzzle Book 4
Book #5: 400 Variety Sudoku Puzzle Book 5
Book #4: 250 Easy to Medium Killer Sudoku 6x6