I really love how useful the Novel Book Ratings site is. If you haven't heard of it, it's a site where members (it's free to join) can rate books on how well they're written and also what kinds of potentially objectionable content they have. Whether you're a member or not, you can look up a book if you're wondering whether it will be something you'd like to read -- if it's one someone has reviewed, you can see what they say it contains. Every time I read a book, I check to see if it's in their database, and if it's not, I add it and review it. (I write my reviews for both the database and blog under the name Hamlette, as you might have guessed.)
If This was a Movie, I Would Rate it: PG-13 for non-explicit sexual situations and alcohol use. Also contains a few swear words.