Medium-Hard Sudoku Puzzle Book For Adults 320 Sudokus (4 puzzles on each page)2 levels of difficulty (medium and hard)For intermediates and advanced puzzlersBook size: 6 x 9 inch (ca. DIN A5)Including instructionsSolutions at the back of the book
The Sudoku puzzle book is the perfect gift for adults who love brain jogging and mental excercises.
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