"The Son of Neptune'' by Rick Riorden is the second book in his 'The Lost Hero' series. It is one of my favorite books I've ever read. It starts off with Percy running away from two Gorgons who he can't permanently kill, they keep coming back from the dead at faster and faster intervals. Percy has amnesia and can't remember anything but his girlfriend Annabeth, he has no idea where he is or where he is going only that he has a sort of internal gps leading him to the Roman demigod camp, Camp Jupiter. He encounters Hera in a disguised form carrying her into the camp where she reveals who she is. Percy is revealed to be the son of Neptune which is more looked down upon at the camp, during the camps war games Percy and his team (the 5th legion) surprisingly win causing Frank to be claimed by his father Mars (Frank and Hazel are Percy's friends at camp). Percy, Hazel, and Frank go on a quest to fulfill a prophecy regaining the 5th legions eagle and weapons lost in Alaska and saving Thanatos the god of death who was imprisoned by a giant working for Gaea. If Thanatos had remained chained the doors of death would have remained open allowing the dead to return from the underworld. After freeing Thanatos Percy, Frank, and Hazel rush back to camp where giants and a monster army are attacking the camp, eventually the camp defeats the army and they get a message from Leo, Jason, Pieper, and Annabeth at the Greek demigod camp, Camp Halfblood. This setting up for the future books of the series where the seven of them go on a quest to save the world from Gaea (the goddess of the Earth who had been asleep for over a millennia awaking to destroy the gods) following the prophecy of 7. This is an amazing book with excellent execution for the idea, and the book playing a major part in the story line. It is perfectly written and a great series to get kids interested in mythology both Greek and Roman. The mythology used is accurate with some of the authors interpretation put in to fit the story being told. The action throughout the book is perfect keeping the reader's attention. In my opinion it is overall an excellent book and a part of a great series.