Young Adult novels and teen books are the best to learn for contemporary language. I'd suggest The Hunger Games if you like dystopian stories; Percy Jackson and the Olympians if you like Greek mythology and adventure. The 39 Clues is a series of short stories of adventure and solving mysteries. If you like vampire, magic, and cheesy romance I'd recommend The Vampire Academy.
If you want a quick read (aka short story) The Ocean at the End of Lane is an amazing fantasy read albeit there's no adaptation of it as of yet. The Hobbit is also a fantasy and adventure short story book; great read; easier to read that the other Tolkien books.