This is a fun book. I've got most of the "World's Stupidest..." series, and they're ALL fun. As you would expect from the title, this volume is full of some of the most hilariously bad chat-up lines I've ever read. Some of them are so incredibly bad, they end up becoming, by some Zen-like inversion, GOOD.
But I'm just heavily biased, because back in early 1996, I made a concerted attempt to produce the World's Worst Chat-Up Line to amuse fellow online Captioneers. And it is this: "I'm no doctor, but you look like you could do with a healthy dose of Vitamin ME." And a version of that line has made it into the book.
So, my own massive ego-trip aside, this book is really good for a laugh - and for defense, because there's a section on how to rebuff unwanted attention. Definitely worth adding to your library, for whatever reason.