Chava is a golem, a creature made of clay, brought to life by a disgraced rabbi who dabbles in dark Kabbalistic magic. When her master, the husband who commissioned her, dies at sea on the voyage from Poland, she is unmoored and adrift as the ship arrives in New York in 1899.

Ahmad is a jinni, a being of fire, born in the ancient Syrian desert. Trapped in an old copper flask by a Bedouin wizard centuries ago, he is released accidentally by a tinsmith in a Lower Manhattan shop. Though he is no longer imprisoned, Ahmad is not entirely free – an unbreakable band of iron binds him to the physical world. 

– The Golem and the Jinni by Helene Wecker