Well of course I have the usual urge to burn Twilight, but there is also a book that depressed me so much that I could start crying at any moment. It's a Dutch book called 'Het fluisterboek', translated it means 'the book of whispers'. It's about a girl who twice tries to commit suicide. I hated it.
since everyone already said the obvious Twilight and Fifty Shades, this is difficult. Maybe Dante's Inferno because that book scared the hell out of me and it would also be pretty ironic to light it on fire.