High-concept contained horror books center on a simple, easily pitchable premise (high-concept) restricted to a single setting or small group of characters (contained), often focusing on isolation and intense suspense. Notable examples include The Girl With All the Gifts, The Exorcist, and Pentagram. The Girl With All the Gifts by M. R. Carey: A high-concept thriller focusing on a special group of children trapped in an apocalyptic scenario. The Exorcist by William Peter Blatty: A quintessential contained horror story focused on a demonic possession within one home. Pentagram by Matthew McGuchan: A high-concept, contained story about people trapped in a pentacle. The Bad Seed by William March: A classic, contained psychological horror focusing on the horror within a household. Try to Sleep by W. G. Tuttle: A collection featuring contained, high-concept tales like Vacation's End and Cut-Up, which deal with isolation and insidious threats. These stories often emphasize a "same, but different" approach, relying on a fresh, easily understood hook.