Imagine if the greek gods were real, and were still alive today. Imagine if there were demigods, roaming the Earth, that we humans knew nothing about. Well, in The Lost Hero by Rick Riordan, you get to see what a world like that would be like; through the demigod’s points of view. In The Lost Hero, each character is facing a different conflict. Earlier in his life, Leo was tricked by the evil primordial god of the earth Gaea to use his fire powers (An attribute that is very rare for a son of Hephaestus to have) for bad. Gaea manipulated his firepower so that he burned down the mechanic shop his mom-owned, and his mom died in the fire. So now he doesn’t want to use his fire powers in fear that he will hurt someone again. Jason lost his memory, so he can’t remember anything that's happened before he woke up on a school bus. Piper is sad because she remembers that Jason and her were boyfriend and girlfriend, but none of the relationship was real, it was just a trick of the mist (the mist basically hides the gods, demigods and greek monsters from humans, although some humans have a gift to see through the mist). The setting of the book is in the USA, in modern times, and for most of the book at a camp called Camp Half-Blood; which is a camp for demigods of greek gods, which all of the main characters are. The main antagonist in the book series is Gaea. Gaea is the Greek primordial goddess of the Earth, which means she was created near the beginning of time. She has been asleep for eons but is now waking up to overthrow the gods. Basically, a lot of the enemies that the main characters face that aren’t Gaea are working for Gaea, like the giant Enceladus, who was keeping Piper's dad captive on Mount Diablo; that giant was working for Gaea. One of the most important memory moments of the book was when Jason got most of his memory back and remembered that he was a son of Jupiter, which is the roman version of Zeus, which means he is Roman and not Greek. This memory moment then makes all of the characters have the biggest aha-moment of the story that sets the scene for the next book in the series. Overall, The Lost Hero is a great book and I would recommend it to anyone who has finished the Percy Jackson series and is left with the feeling of wanting more, or, for anybody who is interested in greek mythology and a great and hard-to-put-down book.