The Lost Hero is the first book in the Heroes of Olympus series, which is the successor to the wildly popular Percy Jackson and the Olympians series. In The Lost Hero, we get to see new demigods as well as old. Percy, Annabeth, and their friends are still in the series and play major roles, but we have new main characters: Jason, Piper, and Leo (all demigods). And they have major obstacles coming ahead - an ancient enemy worse than Kronos is rising, and bringing the dead and all kinds of monsters with her.
The Lost Hero, although it didn't quite match up to the previous Percy Jackson books, was still a good beginning to the series. Riordan has made several huge leaps in his story, and although I'm not too fond of them, they did keep me entertained. The writing was just as good as usual - the humor felt a little forced, but I'm putting that down to the new narrators, who are a lot more flawed (and a bit more annoying) than Percy. There were a lot of twists in the book, and the ending was a depressing cliffhanger that will probably make everyone go, "What??? Noooo!!!"
It probably sounds like I didn't like the book very much, because I'm pointing out all its problems, but I really did enjoy it. I can't wait for the second book and if you're a Percy Jackson fan as well, this is a must-read.