This series was so good! Mythology lessons, a HP/Percy Jackson readalike, fast-paced action, excellent audiobook reader. However, the ending is lackluster. The book is quite good until the very very end. And then I felt like Michael Scott was like "Shoot I need to end this" and wrapped it up very quickly. I also felt like one plotline was left alone for too long, and didn't really understand how it connected to the rest of the story based on how results ended. Oh well. I will still recommend it highly.