Funny thing about the book: I have read two versions of it.
The US release is, as far as I can tell and to my surprise, HEAVILY censored. It is missing most of the juicy (read: "politically incorrect an inappropriate" details). I have read the book about 15 years ago in Czech language and I'm assuming that that one was translated directly from German original and couple years back I have bought the U.S. version of it.
The U.S. version is missing quite a few of "dirty" Werner's thoughts (For the people familiar with the "uncensored" version the part when Werner is imagining the

"nipples" and the "other part of female's anatomy" is completely missing in US release).
Americans can be SO prude, sometimes!!!