135 books • 16 series
Sit & Solve Tough Sudoku (Sit & Solve (R))
Sit & Solve Simple Sudoku (Sit & Solve (R))
Blockbuster Book of Sudoku
Peaceful Mind Book of Sudoku (Peaceful Mind Puzzles)
Help! Our Children Are Overweight!
Way Beyond Black Belt Sudoku (R) (Martial Arts Puzzles)
Sudoku Puzzles for Your Backpack (Puzzlewright Junior Sudoku)
Sudoku Puzzles for a Road Trip (Puzzlewright Junior Sudoku)
Sudoku Puzzles for the Weekend (Puzzlewright Junior Sudoku, #5)
Sudoku Puzzles for Vacation
Sinister Sudoku
Everyday Sudoku
Sophomore Year (Sudoku U)
Freshman Year (Sudoku U)
Bizarre Crossword Variants
The World's Longest Crossword Puzzles
Supersized Book of Sudoku
Absolutely Nasty® Crosswords Level 4
Absolutely Nasty® Crosswords Level 3
Sit & Solve® Bunny Slope Easy Sudoku
Brain Aerobics Wordoku 2
Brain Aerobics Wordoku 1 (Brain Aerobics)
Sit & Solve® Double Black Diamond Hard Sudoku
Large Print Sudoku #4