Will Shortz Presents Vacation Sudoku: 150 Fast, Fun Puzzles

What better way to spend your vacation than cozying up with the latest collection of sudoku?  New York Times crossword editor Will Shortz brings you Vacation Sudoku- 150 sudoku puzzles, ranging in difficulty from easy to challenging. People everywhere can't get enough of this brain-teasing phenomenon.
 
If you haven't tried sudoku yet, the best news is that anyone can do it! There's just one simple rule: Fill in the empty boxes in the nine-by-nine grid, so that every row, column, and three-by-three square contains the numbers 1 through 9, without repeating. That's all! So whether you're on a plane, at the beach, or just simply relaxing in your own backyard, spend your vacation with sudoku.