450 HITORI Puzzles (4x4): A fun logic puzzle: Can you figure out which cells to shade and which should be blank?: Carter, Bailey, Puzzles, Bailey's: 9798548066978: Amazon.com: Books
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Amazon.com: Hitori Adult Puzzle Book: 1000 Hitori (8x8, 10x10, 12x12) Puzzles (The Big Books of Logic Puzzles Series): 9798526524599: Alzamili, Dr. Khalid
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Hitori: 250 Challenging Logic... by Mindful Puzzle Books