Really? I can hardly find a single decent book with a happy end - though that might have more to do with my definition of "decent book" than the number of books which don't end in utter misery. Not sure of this'll fill the genre expectations, but One Flew Over the Cuckoos Nest is cripplingly sad once you've worked out what the ending means. It's also one of the best written pieces of prose I've ever had the pleasure of reading - wholeheartedly recommended to anyone. More "in genre" - I have almost no idea what "Teen Fiction" is, so I can't be of much use there. As for Fantasy, the genre is rife with happy ends - they're fairly staple. Maybe Lovecraft, Kafka, or Edgar Allan Poe could be something to look into? Their works [i]might[/i] fall under a [i]broad[/i] definition of Fantasy, whilst also being harrowing enough to avoid happy ends.