202 books • 15 series
Turn On The Logic Big Book Calcudoku - 500 Easy to Master Puzzles 9x9 (Volume 1) (Calcudoku Big Puzzle Book 500, #1)
Turn On The Logic Big Book Jigsaw - 500 Easy to Master Puzzles 9x9 (Volume 1) (Jigsaw Big Puzzle Book 500, #1)
Turn On The Logic Big Book Hidoku - 500 Easy to Master Puzzles 9x9 (Volume 1) (Hidoku Big Puzzle Book 500, #1)
Turn On The Logic Big Book Numbricks - 500 Easy to Master Puzzles (Volume 1) (Numbricks Big Puzzle Book 500, #1)
Turn On The Logic Big Book Killer Sudoku - 500 Easy to Master Puzzles 9x9 (Volum (Killer Sudoku Big Puzzle Book 500, #1)