The 100 (The Hundred series Book 1) by Kass Morgan – Kindle Edition

No one has set foot on Earth in centuries – until now.
Humanity has lived on spaceships ever since a devastating nuclear war on Earth. But now, one hundred juvenile delinquents are being sent on a dangerous mission: to re-colonize the planet. It could be their second chance at life . . . or it could be a suicide mission.
Clarke was arrested for treason and haunted by the memory of what she really did. Wells, the chancellors son, came to Earth for the girl he loves. Reckless Bellamy fought his way onto the transport pod to protect his sister. And Glass managed to escape 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 mankinds last hope.
The first book in the New York Times bestselling series that inspired the hit television show. If you are desperate for more Bellamy and Clarke, consider this your call Continue the series with Day 21