Book excerpt: More than 400 brain-jogging puzzles give you a crash course in cryptography, while the messages reward you with the comedy of Jay Leno, Elayne Boosler, and Jerry Seinfeld, as well as the wit and wisdom of Hillary Clinton, Stephen King, and Edna St. Vincent Millay. Begin by trying to find the clues through trial and error, or follow the tips for faster results. There's a chart of hints for each puzzle that reveals one crucial letter equivalent. Along the way, you'll probably agree with puzzle number 83: "Thou shalt not take the name of the Lord thy God in vain unless you've used up all the other applicable four-letter words."--W. C. Fields.