A myth-retelling collection in which Percy Jackson, the wisecracking demigod son of Poseidon, narrates the classic Greek myths in his own irreverent, sarcastic teenage voice. Rather than a novel, this is a companion reference work: Percy walks readers from the creation of the cosmos and the war between Gaea, the Titans, and the Olympians through stand-alone tales of the twelve major gods and goddesses, from Zeus and Hera to Athena, Apollo, Artemis, Aphrodite, Hephaestus, Demeter, and Ares. Across roughly nineteen chapters with deliberately ridiculous titles like "Hera Gets a Little Cuckoo," "Zeus Kills Everyone," and "Athena Adopts a Handkerchief," Riordan blends faithful retellings of the source myths with modern slang, snarky asides, and comic exaggeration, making the material approachable for middle-grade readers while keeping the bones of the mythology intact. The hardcover is illustrated throughout with sixty full-color paintings by Caldecott Honoree John Rocco, giving the book the feel of an oversized illustrated treasury. Because the gods' stories are inherently full of betrayal, vengeance, and violence, Percy's flippant tone often sits alongside genuinely dark material. It works both as a standalone introduction to Greek mythology and as a companion to the Percy Jackson and the Olympians series, and it is best read as a humorous mythology primer rather than a continuation of Percy's own adventures.