While you can play sudoku online using one of the many sudoku websites available, many people enjoy downloading printable sudoku puzzles that they can than print out and solve at their leisure. One of the advantages of printable sudoku puzzles is that you can get them any time you wish to start solving sudoku. You don't need to go to the store and buy a puzzle book, you can simply surf the internet find a puzzle you would like to solve, and simply print it out on your screen. Solving these puzzles helps you learn how to solve sudoku faster and can greatly increase your ability.
Here are some sudoku puzzle books you can download and print. To save them to your hard drive simply right click on the following links and choose "save as" to download to your computer.
Easy Sudoku Puzzles
Medium Sudoku puzzles
Both of these sudoku books contain 25 printable puzzles and matching solutions. They come in pdf format and use the free adobe pdf reader to access.