To solve the 106 sudoku puzzles all you have to do is fill in the boxes so that the nine rows, the nine columns, and the nine 3X3 sections all contain every digit from 1 to 9. That's all there is to it. If you get hopelessly stuck, the answers to all the puzzles are in the back of the book.
Sudoku that's easy to carry--but tough to solve! If you like to do your puzzle-solving on the go, the portable Petite Hard Sudoku is the ticket. Sudoku master Frank Longo has crafted 106 mind-melting conundrums that all require upper-level solving techniques to conquer. So grab a pencil--or pen, if you dare!--and give your brain a workout.