Jenny

“realm of gods and demigods. Soon he is off on the first of a series of quests with his friends—Annabeth, a daughter of the goddess Athena, and Grover, a young satyr, or goat-boy—which will take them across the breadth of the United States and bring them face-to-face with gods and monsters that have lived since ancient times. After several years, Riordan succeeded in finding a publisher who would buy the rights to The Lightning Thief, but the book was not actually published then. Instead, the rights were traded”
― Natalie Buczynsky, The Unofficial Heroes of Olympus Companion: Gods, Monsters, Myths and What's in Store for Jason, Piper and Leo