In a modern megacity where cults conduct wars behind permits and prayers, Incarnations-angels and demons dropped like living warheads-erase neighborhoods in seconds. When the Order of the Pyre unleashes Khal-Zhaur, a god who has harvested souls for 220 years, demon-tamer Elias Brand wagers his body, his faith, and his city on an impossible marriage: bind the fire, exile the god, and end the ledger of ash. Invocation of the Fire God is terror, suspense, and survival-an urban apocalypse fought with names, thresholds, and the courage to become a gate.