I Am Number Four by Pittacus Lore

"John Smith seems like an ordinary teenager, living a normal life with his guardian Henri in Paradise, Ohio. But for John, keeping a low profile is essential, because he is not an ordinary teenager. He’s an alien from the planet Lorien, and he’s on the run. A group of evil aliens from the planet Mogadore, who destroyed his world, are hunting anyone who escaped.

Nine Loric children were sent to Earth to live in hiding until they grew up and developed their Legacies, powers that would help them fight back—and help them save us. Three of them are now dead. John is Number Four, and he knows he’s next…."

Softcover, wear from use, notes written inside front cover, binding tight, pages bright, a decent copy