The Lost Hero (Heroes of Olympus, #1)
I wasn't sure how I felt about leaving the original characters behind for this book, but I have to admit it did grow on me. I really enjoyed the intertwining of the Roman and Greek gods into the story line. I also really like that we are seeing some of the things that were forshadowed in previous books (Annabeth saying 'demigods don't go to San Francisco') be explained. I really look forward to seeing how Jason's troubles are resolved and meeting up with Percy agian!