Planet Urth Books in Order

Two centuries after chemical warfare transformed the planet, seventeen-year-old Avery protects her younger sister June in a forest refuge. With their father dead, the sisters must survive hostile mutants and the brutal Urthmen.

Five years after Kildare's defeat, the threat posed by the Urthmen appears diminished. That fragile reprieve is broken by the arrival of another enemy, forcing humanity to confront a new struggle for survival.

Avery's victory in the underground city leaves her facing the king's approaching army. Outnumbered and searching for a defensible stronghold, she must contend with betrayal that threatens to fracture her already vulnerable alliance.

Avery, June, Will, Oliver, and Riley leave their forest refuge to search uncharted territory for other humans. Their hope of finding safety carries them into unfamiliar lands where new dangers complicate every step.

Hunted by the king's forces, Avery and her companions need fuel to continue their journey. Their search brings them to an underground city of humans, raising questions about whether this refuge can offer real protection.

After ten years of peace, humans gather to celebrate their survival alongside the Urthmen. An attack on Cassowary shatters that security, sending the survivors fleeing and searching for family members in a suddenly hostile world.

Seventeen-year-old Lucas survives the destruction of his hidden human village only to be enslaved by the Urthmen. Forced into arena combat, he must find a way to secure freedom for himself and his siblings.

Lucas and his companions flee the forest when a stranger named Garan offers another possibility: a city where humans and Urthmen coexist. They must decide whether his promise represents genuine refuge or another trap.

Lucas, Ara, and Pike face captivity in the Urthmen's arena, with their siblings' safety adding urgency to escape. Returning to their former village offers no solution, leaving them searching for another route to freedom.

Strangers bring news of resistance beyond Sin City, forcing Lucas to weigh peaceful refuge against the fight outside. Elsewhere, Avery's hungry family remains hunted, searching for safety while another danger draws closer.