The Son of Neptune by Rick Riordan is the second book in the Heroes of Olympus Series. The book is about another adventure with Percy Jackson the half-blood. In this adventure, Percy loses his memory and is being chased by monster of all kinds. He winds up at a Roman half-blood camp called Camp Jupiter. Percy befriends Frank and Hazel. They go on a quest together to save the world from Gaea, the evil earth goddess. I enjoyed this book because of its vivid details and adventure. This book is one of my favorite books. I would recommend it to people who enjoyed the Percy Jackson books who enjoy mythology or anyone who enjoys adventure books.