This is an alternate cover edition for 9780996624817 The Sweepers are coming. The hunt for humankind begins. The year is 2069. Sixteen-year-old Derry and her brother live in perpetual fear of capture. They survive underground on a post-apocalyptic earth overrun by gangs and clones, and hunted overhead by mysterious hoverships. When her brother goes missing, Derry’s only hope of finding him is to strike a deal with a group of cutthroat subversives. Desperate to save her only sibling, she leads a daring raid to uncover the secrets behind the Sweepers’ hoverships, but she soon finds out the world she knows is a lie. Keeping her brother alive may require trusting her enemy and opening her heart to someone scarcely human. Immurement is the first book in The Undergrounders Series, a sci-fi dystopian thriller trilogy with a gritty heroine and twists you won’t see coming!