It's been a while now since the puzzle craze Sudoku first hit the English-speaking world, so one might think that it's about time it moved to the next level. Thanks to French developer Glenn Sanson, you can now generate a book of random Sudoku puzzles -- complete with solutions -- in PDF format. Once generated, the books are ready for your printing and problem-solving pleasure.
The free online service, entitled SudoPDF, is a Java applet that generates the Sudoku puzzles on the fly. Visitors just need to choose a difficulty level and number of pages. They then hit the SudoPDF button to get a nice-looking PDF puzzle-book.
Interested Planet PDF readers can visit the SudoPDF web page to generate hours of Sudoku-related fun.
OK, so you want to stamp your document. Maybe you need to give reviewers some advice about the document's status or sensitivity. This tip from author Ted Padova demonstrates how to add stamps with the Stamp Tool along with related comments.