Jigsaw Sudoku: 500 Hard Puzzles: 5
Dr. Khalid Alzamili Pub
The Giant Book of Minesweeper: 1000 Easy to Hard Puzzles (10x10): 51
Samurai Sudoku: 500 Hard Sudoku Puzzles Overlapping into 100 Style: 4
Samurai Sudoku: 500 Easy to Hard Sudoku Puzzles Overlapping into 100 Style
Jigsaw Sudoku: 500 Medium to Very Hard: 2
The Giant Book of Binary Puzzle: 1000 Easy to Hard (12x12) Puzzles: 11
Logic Puzzles & Brain Games for Adults: 500 Easy to Hard 12...
The Giant Book of Jigsaw Sudoku: 1000 Medium to Very Hard Puzzles
Calcudoku Adult Puzzle Book: 500 Easy to Hard (9x9) Puzzles : Keep...
The Giant Book of Battleships: Battleship Solitaire : 1000 Puzzles (9x9)
Hard Logic Puzzles & Brain Games for Adults: 500 12 Puzzle Types...
The Giant Book of Jigsaw Sudoku: 1000 Hard Sudoku Puzzles
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