This is the sickest, most disturbing, most obscene book upon which I have ever stumbled, and is the most offensive birthday gift I have ever received.
It's perfect. I love it!
All kidding aside, this is a book very much about what it says it is about. The smells inside include fesces, vomit, halitosis, the gas we pass ("Your farts aren't your own! Your large intestine is full of millions of microscopic bacteria that live inside you... their tiny farts add up until... you produce a bottom burp yourself!"), and the book is full of fabulously scientific hilarity - all of it gross, of course.
Not for the faint of heart (or smell), but it's one heck of a conversation starter if you leave it out in the open. My friend knew what he was doing when he bought this gem for my birthday.