If you found the desperate, claustrophobic terror of The Troop gripping, you'll be riveted by The Ruins. Here, a vacation in Mexico turns into a waking nightmare as a group of friends is stranded atop an ancient ruin, facing a threat every bit as merciless and biological as the one that preyed on Cutter’s group of boys. The intense focus on the characters’ doomed struggle for survival in a single, inescapable locale will keep you turning pages late into the night.

If the unrelenting pace and constant sense of dread in The Troop kept you hooked, Bird Box will do the same. Malorie’s desperate flight down a river with two small children, blindfolded to survive, is packed with the same breathless urgency and mounting terror. Every chapter propels you forward, never letting you relax for a moment.

If you were drawn to the psychological unraveling of the boys in The Troop, Penpal will haunt you. Told through the fragmented childhood memories of the unnamed narrator, this novel explores the creeping dread and paranoia that builds as the protagonist pieces together a disturbing reality. The way childhood innocence is corrupted by terror will stay with you long after the final page.

If the bleak, disturbing atmosphere and exploration of human darkness in The Troop resonated with you, Lord of the Flies is a chilling classic that lays bare the brutality that emerges when civilization breaks down. Watching Ralph, Jack, and the other boys descend into violence and madness is just as harrowing as the horrors faced by Cutter’s group.

If you appreciated the moral complexity and difficult choices faced by the characters in The Troop, The Girl with All the Gifts will fascinate you. Melanie, a highly unusual child, and the adults trying to survive in a world overrun by a deadly pathogen, are all forced to confront their own ethics. The lines between right and wrong blur as survival becomes paramount.