Maximum Ride, Witch and Wizard, and Daniel X series by James Patterson. Percy Jackson and the Olympians, Heroes of Olympus, and Kane Chronicles by Rick Riordan. Inheritance series by Christopher Paolini. Artemis Fowl Series by Eoin Colfer. Vampire Academy Series by Richelle Mead.
Some good books to read include The Hunger Games if you love adventure, Beryllium if you love fantasy or Lifestyle Vanity if you love romance. Check out other suggestions on http://www.goodreads.com/list/tag/teen.
Divergent by Veronica Roth. There is also a second book called Insurgent and the third book (jokingly called Detergent) hasn't been released yet. The books that Samcally listed are really good too. Especially the ones by Rick Riordan. I hope I helped!