I can't speak to its suitability past the information obtained from a quick google. It seems like the sort of book that deals with an important issue but from an author that seems to have an openly hostile perspective to right-wing christianity. It might be the sort of thing that would be interesting to dissect/deconstruct if you cared to spend the time and mental energy.

However, what I can speak to is that when I was in school, usually if I approached a teacher and said I had a real problem with something because of my religious conviction/ flat out refused they'd assign me something else. Perhaps if you're positive and non-confrontational and your daughter is in agreement the school would be willing to accommodate you.