The Breakfast Club meets 28 Days Later in this revised and expanded edition of Courtney Summers’s cult classic about a traumatized young woman forced to survive the zombie apocalypse.

Sloane Price knows there are worse things than the end of the world, so when the zombie apocalypse happens, the opportunity to escape her violent home life offers no relief. She’s already lost the one thing that matters most—her sister—and now seems like the perfect time to give up.

But when she inadvertently ends up barricaded in her high school with five other teens, their desperate and volatile bids for survival force a series of impossible decisions. As the days creep by and the dead close in, Sloane must confront everything she thought she knew about life, death, survival, and sacrifice and, once and for all, make a choice.

Joined together for the first time in this special “director’s cut” edition, This Is Not a Test and its novella sequel Please Remain Calm explore the forces that tether us to life—and to each other—in our darkest times.