The Fault in Our Stars is a book by John Green. It's full of amazingness. I've read it six times. Currently reading it again.
Not that I'm obsessed or anything :L hahaha The film adaption is being released next year!
Be forewarned: If you tend to cry salty, bitter tears at books that intertwine cancer, sadness, love, cigarette metaphors, laugh out loud moments, grand gestures and poetic prose only teenagers in books could utter, than you will more than likely need some +
But it's 100% worth it Trust me :L