The Sudoku Companion Roll-A-Puzzle System is a lightweight, handheld comfortable unit that allows you to solve the new popular Sudoku puzzles. Solve the first puzzle and upon completion, simply turn the dial and a new puzzle appears in the window. Each roll contains 12 or more puzzles, and if you get stumped, the answer grids are in-between the puzzles for easy reference. Complete a roll and open the front, remove the finished roll and easily insert a new roll; equipped with a built in draw, pencil sharpener and storage of extra rolls.