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Continue to ChatActivity Book: Logic Puzzles for Adults & Seniors: 500 Hard Puzzles (Sudoku - Fillomino - Straights - Futoshiki - Binary - Slitherlin https://booksdeli.com/en-ae/products/activity-book-logic-puzzles-for-adults-seniors-500-hard-puzzles-sudoku-fillomino-straights-futoshiki-binary-slitherlin-9781708911799