Cartoonist and novelist Scott Adams (of Dilbert fame) has declared that the PDF eBook version of his book God's Debris is available for download, free-of-charge for personal use. According to the author, the move is intended to foster discussion of issues raised in the book.
If the "free" part alone isn't enough to pique your interest, here is the book's synopsis:
Imagine that you meet a very old man who -- you eventually realize -- knows literally everything. Imagine that he explains for you the great mysteries of life -- quantum physics, evolution, God, gravity, light, psychic phenomenon, and probability -- in a way so simple, so novel, and so compelling that it all fits together and makes perfect sense. What does it feel like to suddenly understand everything? God's Debris isn't the final answer to the Big Questions. But it might be the most compelling vision of reality you will ever read. The thought experiment is this: Try to figure out what's wrong with the old man's explanation of reality. Share the book with your smart friends then discuss it later while enjoying a beverage.
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.