Mass Extinction Event Books in Order

Elizabeth's survivor group in Boston faces scavengers and an approaching organized enemy. Meanwhile, Thomas travels with soldiers toward the city and is assigned to guard a captured zombie, raising troubling questions about the people commanding him.

A power failure signals a spreading catastrophe across America. Elizabeth and Henry wait alone in Manhattan for their parents, while Thomas's isolated Oklahoma family encounters an infection that threatens to turn their farm into another deadly refuge.

Elizabeth and Henry try to reach home through a ruined city, only to discover new dangers waiting there. Far away, Thomas struggles to protect his brother while searching for his father and facing a painful decision about their mother.

Leaving the city, Elizabeth finds shelter at a farmhouse whose community hides dangerous secrets. Thomas also encounters survivors, but ends up imprisoned in a basement, where finding a way out becomes his immediate struggle in the collapsing world.

Elizabeth and Toad struggle to survive as the infection threatens another young victim. Elsewhere, Thomas joins survivors trying to reclaim a city, but their mysterious leader Quinn may offer something far worse than the rescue they hope for.

Rescued from the forest, Elizabeth joins survivors and faces an unexpected reunion that complicates their hopes of saving humanity. Meanwhile, Thomas learns troubling truths about another group, forcing him to reconsider alliances and decide where he stands.

Elizabeth and Thomas follow a mysterious girl to an apparently abandoned hospital during the zombie crisis. Experiments beneath the building offer the possibility of a cure, but the pair soon finds that survival may demand terrible sacrifices.

Elizabeth returns to Boston to search for her father and is pulled into a struggle involving the city's new rulers. Meanwhile, Thomas and Carter confront dangers surrounding a possible cure and the mysterious plans of Project Atherius.

Back in New York, Elizabeth tries to rebuild a life amid reminders of her lost family, until sudden deaths raise fears of renewed zombie danger. Thomas, meanwhile, decides to search for his missing sister and hopes Elizabeth will join him.

As New York collapses, Elizabeth enters the subway tunnels in search of escape, only to encounter zombies and hunting rats. Elsewhere, Thomas suspects his surviving sister is hiding something that could force him to choose between family and friends.