The title already makes it clear that no one here is protected; the (confident) believers among readers should therefore keep their blood pressure in the eye.
For everyone else, the book provides the main arguments against religion as such and the major churches in particular, where the author supports his thesis with numerous documents. A certain degree of controversy is indeed already clearly makes reading but also very exciting.
Especially the big book-religions are taken apart sent, with their political (usually makes political) motives appear clearly to light. (As for Christianity, the way I can also recommend "Five hundred years aberration" by Helmut Knolle, they are written essentially factual, but has by no less eye-openers to offer.)
Away from the controversy (which may well be very offensive to convince believers) transported Hitchens very clearly his desire for more education, according to their own decisions and to reason in general.
So who is among those who raise their eyebrows when
- Mobs set fire to embassies (or flags or books)
- They think of the European Middle Ages
- Is arguing about celibacy
- Of the woman as a mere subject of the speech is
- The Pope reflected on sex
Who / which should definitely read this book!