The Earthborn — Paul Collins

When the spaceship Colony is forces to abort its mission to colonize Tau Ceti III and instead crashlands on Earth, it's a homecoming for fourteen-year-old Welkin Roberts. Well...sort of.

Welkin is a Skyborn. Having lived his entire life on board a spaceship, his only memories of his home planet is what he has studied from the Colony archives. Believing the Earthborn no better than animals, the Skyborn elders decide to exterminate them before recolonizing Earth. On a reconnaisance mission, however, Welkin is ambushed by a gang known as Jabbers. Rescued by a rival gang of teenage survivors, Welkin realizes he needs the help of these Earthborn to survive.

The question is, do they need him?