The 100 by Kass Morgan
"No one has set foot on Earth in centuries -- until now.
Ever since a devastating nuclear war, humanity has lived on spaceships far above Earth's radioactive surface. Now, one hundred juvenile delinquents -- considered expendable by society -- are being sent on a dangerous mission: to recolonize the planet. It could be their second chance at life...or it could be a suicide mission.
CLARKE was arrested for treason, though she's haunted by the memory of what she really did. WELLS, the chancellor's son, came to Earth for the girl he loves -- but will she ever forgive him? Reckless BELLAMY fought his way onto the transport pod to protect his sister, the other half of the only pair of siblings in the universe. And GLASS managed to escape back onto the ship, only to find that life there is just as dangerous as she feared it would be on Earth.
Confronted with a savage land and haunted by secrets from their pasts, the hundred must fight to survive. They were never meant to be heroes, but they may be mankind's last hope."
Softcover, light wear from use, light creases on back cover, binding tight, pages bright, a very nice copy!