Other reviewers have complained that this book is just a kind of pornographic attempt to shock, but I think that is missing the point. Sure, the writer appears to be obsessed with the most basic animal functions of our bodies, but there's more to this than pornography, which is rarely readable or intentionally amusing (or so I'm told!). The reason the book has sold so well is surely because it is, in parts, very funny, and although there are lots of dirty words it is at least quite well-written, though Ms Roche does have a problem knowing when to use commas instead of full-stops (eg: 'They thought I didn't notice. But I did. And how.') And this: 'I swear I will. Helen. Very impressive'. Note that one-word sentence: 'Helen', which is the narrator referring to herself, something she does about a thousand times throughout this relatively short book, rather irritatingly.
The author is English but brought up in Germany and it is surely the combination of English lavatory humor and German openness concerning the body that is responsible for producing such an unlikely best-seller. So is it worth reading? Only if you've got nothing better to do and want to know what all the fuss is about. (Yes, there's been a lot of fuss over this book, which has been taken far too seriously for a novel that was obviously intended as a joke.)
The blurb on the back cover, a Granta quote claiming the book evokes 'The Catcher in the Rye', is nonsense, and anyone expecting such quality will be sadly disappointed, as is usually the case with back-cover blurbs. The best that can be said about this book is that, considering the limitations of the subject matter and the location (we never leave the hospital), and the fact that there is no plot whatsoever, it is quite entertaining and easy to read, assuming you aren't too squeamish.