Reading for pleasure: any recommendations?

Now that I don’t have exams to study for and research papers to write (yay!), I’d like to start reading for pleasure, something I haven’t done since high school. Unfortunately, I only know one (yes, one) person that reads for pleasure and, unless I want to limit myself to Stephen King novels, I can’t rely on her for suggestions.

I want books that are fun to read and are also interesting in a “I-can’t-put-the-book-down” kind of way. I’m open to fiction or non-fiction, but nothing over 400 pages. I’m really interested in non-fiction books about serial killers – any suggestions? I also love books with a lot of twists and turns; the darker the better! I remember reading Go Ask Alice and The Child Called It and really enjoying them.

Don’t refrain from suggesting books that were written years ago, because I probably haven’t read it – nothing really old, though. I’m trying to find a copy of Flowers in the Attic because I’ve only seen the film and I hear the book is much juicer and more scandalous.

I’m open to anything aside from romance novels (I don’t mind romance, but no Fabio on the cover, please) and anything that I’ll need to use a dictionary to understand, but a synopsis of the books you suggest would be awesome.