Ken Jennings is here to tell us that mother and father didn't always know best. Yes, all those years you were told not to sit too close to the television (you'll go blind!), or swallow your gum (it stays in your stomach for seven years!), or crack your knuckles (arthritis!) are called into question by our country's leading trivia guru. Jennings separates myth from fact to humorously debunk a wide variety of parental edicts: no swimming after meals, sit up straight, don't talk to strangers, you'll get worms from cookie dough, and so on.

Combining the Q&A tradition of Why Do Men Have Nipples? and the anti-helicopter parenting philosophy of The Dangerous Book for Boys, Jennings exposes countless examples of parental wisdom run amuck, armed with medical case histories, scientific findings, and even the occasional experiment on himself (or his kids). Whether you're a parent who wants to know what you can stop worrying about or a kid (of any age) looking to say, "I told you so", this is the book you've been waiting for.