Locker Nine Books in Order

Locker Nine answers a question that runs underneath much of Horton’s fiction: if you believe the world could fall apart, how do you prepare your kids without scaring them half to death. The series centers on Robert Hardwick, a science-fiction writer who makes his living imagining the end of the world, and his college-age daughter Grace.

Before Grace leaves home for her first year at a university several states away, Robert does more than give the usual dorm-room lecture. He trains her to shoot, to defend herself, and to think through worst-case scenarios. He also hands her a small key she wears around her neck, marked with numbers she doesn’t understand. It’s his insurance policy—a way to get her to safety if the unthinkable ever happens.

When coordinated terror attacks hit across the country, including on Grace’s campus, that unthinkable day arrives. Locker Nine follows her scramble out of a collapsing college town, guided by her father’s notes to a storage unit packed with gear. With a roommate in tow and a violent, game-obsessed loner trailing in their wake, Grace tries to navigate back roads and backwoods toward home.

In Grace Under Fire, she teams up with Tom, a disabled veteran in a tracked wheelchair who understands pain and loss better than most. Their journey across a brutalized America forces Grace to grow from nervous student into someone capable of hard choices. Back home, Robert isn’t waiting passively; he’s moving toward her, using a loose network of friends and safe houses to fight his own way south.

Later books like Compound Fracture and Blood Bought shift more of the focus to Robert. After a siege at a Georgia survival compound, he finds his family farm targeted by a corrupt congressman whose sole disaster plan is to steal what others have stockpiled. The Hardwicks and their allies have to decide what they’re willing to trade in blood to keep the land and supplies that may be their only lifeline.

Locker Nine shares the same timeline as The Borrowed World and The Mad Mick, and characters wander between the series. What makes these books stand out is their emphasis on family—parents and children trying to find each other through chaos, and the ways preparation can help or hinder when events finally outpace the plan.