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Diagnosed with a terminal illness, Kayla has nothing left to lose—until a haunting video leads her to a mythic door whispered about in hidden forums and conspiracy threads. Inside lies the Bazaar: a sentient market of suffering, indulgence, and impossible bargains, where memories, body parts, and fragments of identity are currency. With each game she plays, Kayla earns precious tokens toward survival—but every win costs her something deeper. When a powerful client offers her a fast-track to freedom in exchange for her body, she agrees, believing it just another trade. But what she loses cannot be undone, and what she gains may not be worth the price. Brutal, erotic, and unflinching, Knock Twice is a descent into a world where horror is transactional, and salvation is not the only thing for sale. Comparable works include The Ballad of Black Tom by Victor LaValle; Clive Barker’s Books of Blood; Tender is the Flesh by Agustina Bazterrica