The sequel to The Lost Hero, this is a pretty good back. If you've read any other books of Riordan's, you'll know that the heroes usually travel across the country (or the world) on their quest. In The Son of Neptune, Percy (from Camp Half-Blood, though he doesn't know it as his memory is lost), Frank, and Hazel, travel up the West Coast, through northern California, Oregon, and finally, Alaska. It's kind of frustrating though, cause if you've read the other Greek series, you know who Percy is and you really want him to find out. But it's a suspenseful and funny book, full of adventure.
However, one of the characters is named Frank Zhang, and he's supposedly Chinese. But there are some very cliched views of Chinese people in the book and Zhang does not mean "master of bows" in Chinese, as Riordan claims. It means open. Riordan obviously didn't really do his research that well.
I still liked it though, and I really can't wait to read the third book, The Mark of Athena; the book built up a lot of suspense. I think the title of the next book has something to do with Annabeth, who is Athena's daughter. And, by the way, I like the Greeks way better than the Romans. Just saying. 4 1/2 stars.