"The Bartimaeus Trilogy" is a series of fantasy novels written by Jonathan Stroud. It consists of three main books: The Amulet of Samarkand, The Golem's Eye, and Ptolemy's Gate. The story is set in an alternate version of London during the early 20th century, where magic is real and practiced by a ruling class of magicians. The narrative follows a young magician named Nathaniel and a sarcastic, ancient djinni named Bartimaeus. Their adventures explore themes of power, ambition, and the consequences of magic, blending humor with darker elements of society and politics.