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Logic Puzzles & Brain Games for Adults: 500 Easy to Hard Puzzles & 12 Puzzle Types (Sudoku, Fillomino, Battleships, Calcudoku, Binary Puzzle, ... and Numbrix) by Khalid Alzamili | Goodreads
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Amazon.com: Puzzle Baron's Logic Puzzles, Volume 3: More Hours of Brain- Challenging Fun!: 9781465454652: Puzzle Baron: Books
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