6 Pack 600+ Sudoku Puzzles for Adults Bundle - Sudoku Puzzle Books Bulk - 6 Sudoku Puzzle Books for Adults & Seniors with Brain Stimulating Activities Plus Pens and Bookmark | Sudoku Puzzles. This bulk sudoku puzzle pack comes with 6 sudoku puzzle books with over 600 sudoku puzzles in varying levels of difficulty. These sudoku puzzles feature puzzles in a wide variety of difficulties, making this assortment of puzzle books great for the whole family. Use these sudoku puzzles to unwind and relax after a long day while also sharpening your mind and improving your puzzle solving skills. This 6 pack of sudoku puzzles also comes with pens to complete the puzzles and a bookmark to hold your place in your puzzle book.