User blog comment:Percy Jackson12/The Seven/@comment-4448732-20111014231332/@comment-1515612-20111015001707

I think Rick might of had an attachment to the first characters, so he wanted to continue to use them. I think he wanted things to still feel familiar to us, so it's not like a huge slam in the face. For 5 books we were so used to Percy because it was in his point of view and his life. I was pretty bummed when Percy wasn't in The Lost Hero (actually, i was really pissed and the whole time i just wanted him there). Plus, in my eyes the TLO wasn't enough of an ending. Sure, it was nice and everything, but I want Rick to be like ~10 years later~ and show kids and whatnot they have together.