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.
Anything by Haddix : Running out of Time, The Shadow Children (series), Lost, Sent,... and I know she wrote more. They are very good mystery/fiction books. She also wrote Double Identity, which I have not read yet, but I will once I can find it at a used book store.