If you haven't heard of Rick Riordan, you've been living in a post-apocalyptic bunker, cut off from the world. He's the #1 New York Times bestselling author of three different series-- Percy Jackson and the Olympians, the Kane Chronicles, and Heroes of Olympus. He's also penned a few of the 39 Clues titles. He's a big deal.

His newest book, The Mark of Athena, is coming out tomorrow, October 2, 2012. It's the third in the Heroes of Olympus series. Re-read the first two to refresh your memory then tackle the 580-page new release.
1. The Lost Hero
2. The Son of Neptune
3. The Mark of Athena

If you're just learning about Rick Riordan (again, where in the world have you been?!), you really need to go back and read the Percy Jackson and the Olympians series first.
1. The Lightning Thief
2. The Sea of Monsters
3. The Titan's Curse
4. The Battle of the Labyrinth
5. The Last Olympian

Each title is also available as an audiobook. Or you can check out a pre-loaded Nook. If you're interested in studying the mythology that drives both series, take a look at the 290s on the Kid Zone's nonfiction shelves.