A new mergirl shows up at Mount Olympus Academy-- and Poseidon just might be her perfect match in this seventeenth Goddess Girls adventure. Amphitrite is a mergirl with a big crush on Poseidon but will his quirks make her fall out of like?
When Percy Jackson, a seventh-grade demigod living in New York, learns from his friend Annabeth that someone has poisoned the magical borders that protect Camp Half-Blood, Percy and his friends must journey into the Sea of Monsters to save their camp.