It's a book by Jeopardy champ Ken Jennings debunking and/or bunking varius bits of folk wisdom. It's a funny easy, breezy read. On the other hand, I don't think I retained much of it. Other than: eyestrain is not permanent eye damage, but people keep thinking it is. Oh, and there was some history of where the "Feed a Cold and Starve a Fever" bad-advice comes from, but I've forgotten that, too. No wonder these myths endure—it's tough to remember which are right or wrong.