User blog comment:Hyperborean/"The House of Hades" – official expectations blog/@comment-10487081-20130313232701/@comment-142.134.66.58-20130315215944

Usually Rick Riordan has a plan. I was reading the Kane chronicles and in the last book at the dance it mentions Drew and Lacey. It even said that they go to some camp together. So I think that it's safe to say that he's always making connections.