I had this book out when family was over and everyone was checking it out. Basically, you look up your symptom (headache, whatever) and the book tells you what terrible disease you're dying from. I don't understand the reviewer complaining about the medical advice -- um, hello, it's a HUMOR BOOK! And my two sisters are nurses and they thought everything was hilarious. It looks legit to me! (And I watch Grey's Anatomy and House, so I am clearly an expert.) Seriously, this book is probably used by the writers of those TV shows because just like on the show, the most innocent symptoms indicate the most horrible killer disease ever. Just don't give it to your hypochondriac elderly aunt or anything. Also beware: My kids use it as a way to get out of school..hey, maybe I should try it for work..."Oh, my ribs hurt, I have costochondritis!"