A new novel by the bestselling author of “Fragment”! After one of the most astonishing discoveries in human history—the discovery of a unique intelligent species living on the island of Henders—biologists Nell and Geoffrey Beanswanger receive a mysterious and dizzyingly generous offer from a Russian oligarch: to visit and study a unique artificial ecosystem created by his specialists somewhere deep beneath the Ural Mountains. Curious scientists have no idea what “temple of demons” a deranged rich man, seized by the idea of absolute power, has built. Death threatens not only Nell and Geoffrey, but all of humanity. Only the rational inhabitants of the island of Henders can save the world from an unprecedented horror…