The Lost Hero

The Lost Hero is the first novel in Rick Riordan's Heroes of Olympus series, a spinoff to the Percy Jackson and the Olympians series that takes place some time after the conclusion of The Last Olympian. It follows a new set of demigods and some returning heroes as they begin a quest rooted in a new Great Prophecy.

Teaser
" Jason has a problem . He doesn’t remember anything before waking up in a bus full of kids on a field trip. Apparently he has a girlfriend named Piper, and a best friend named Leo. They’re all students at a boarding school for “bad kids.” What did Jason do to end up here? And where is here, exactly?

Piper has a secret. Her father has been missing for three days, ever since she had that terrifying nightmare about his being in trouble. Piper doesn’t understand her dream, or why her boyfriend suddenly doesn’t recognize her. When a freak storm hits during the school trip, unleashing strange creatures and whisking her, Jason, and Leo away to someplace called Camp Half-Blood, she has a feeling she’s going to find out.

Leo has a way with tools. When he sees his cabin at Camp Half-Blood, filled with power tools and machine parts, he feels right at home. But there’s weird stuff, too—like the curse everyone keeps talking about, and some camper who;s gone missing. Weirdest of all, his bunkmates insist that each of them—including Leo—is related to a  god. Does this have anything to do with Jason's amnesia, or the fact that Leo keeps seeing ghosts?"

--from Goodreads

Characters

 * Jason Grace, a son of Zeus
 * Piper McLean, a daughter of Aphrodite
 * Leo Valdez, a son of Hephaestus
 * Annabeth Chase, a daughter of Athena
 * Rachel Elizabeth Dare, the Oracle

Series and Sequels
The Lost Hero is the first in a five-part series; it is followed immediately by The Son of Neptune. It is the second series following Camp Half-Blood, taking place some time after the end of ''The Last Olympian. If you want to read the Percy Jackson and the Olympians series, the series to which this is a spinoff, start with The Lightning Thief''.