158 books • 21 series
250 Hard Chain Sudoku Puzzles 8x8 (Chain Sudoku Book, #23)
250 Easy Chain Sudoku Puzzles 5x5 (Chain Sudoku Book, #6)
250 Easy to Medium Chain Sudoku Puzzles 4x4 (Chain Sudoku Book, #4)
250 Easy Chain Sudoku Puzzles 4x4 (Chain Sudoku Book, #1)
250 Hard Chain Sudoku Puzzles 4x4 (Chain Sudoku Book, #3)
250 Medium Chain Sudoku Puzzles 4x4 (Chain Sudoku Book, #2)
Hidoku Puzzle Book 3 (Ultimate Hidoku Book, #3)
Hidoku Puzzle Book (Ultimate Hidoku Book, #1)
Hidoku Puzzle Book 2 (Ultimate Hidoku Book, #2)
Numbricks Puzzle Book 3 (Numbricks Challenge, #3)
Numbricks Puzzle Book (Numbricks Challenge, #1)
Numbricks Puzzle Book 2 (Numbricks Challenge, #2)
Super Hidoku Puzzles Book 1 (Hidoku Big Book, #1)
400 Variety Puzzle Books for Adults (Variety Puzzle Books, #1)
400 Variety Sudoku Puzzle Books for Adults (Variety Sudoku Books, #3)
100 Large-Print Hard Numbricks Puzzles Book for Adults (Large-Print, #3)
100 Large-Print Easy to Medium Numbricks Puzzles Book for Adults (Large-Print, #4)
100 Large-Print Medium Numbricks Puzzles Book for Adults (Large-Print, #2)
100 Large-Print Medium to Hard Numbricks Puzzles Book for Adults (Large-Print, #5)
100 Large-Print Easy Numbricks Puzzles Book for Adults (Large-Print, #1)
250 Sudoku Puzzles 6x6 for Kids (Sudoku Kids, #1)
61 Math Problem Search Puzzles 7x7 (Math Problem Search, #1)
250 Very Hard Jigsaw Sudoku Puzzles 9x9 (Jigsaw Sudoku, #5)
250 Easy Sudoku X Puzzles 9x9 (Sudoku X, #2)