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- Challenge! Sudoku puzzle books medium no.2: Sudoku puzzle books for everyone challenge and super fun 101 pages 8.5"x11", good for gift great for friends and family
- Brinicles Publishing : Sudoku Puzzles Easy to Hard: Sudoku puzzle book for adults: Sudoku puzzle books for everyone challenge and super fun ~ 100 ... good for gift ~ great for friends and family
- Don't let a bad day make you feel like you have a bad life, Sudoku puzzle books medium to hard for adult : Brinicles Publishing: Sudoku puzzle books for adults ~ great for friends and family