User blog comment:Hyperborean/"The House of Hades" – official expectations blog/@comment-5850470-20121217235414/@comment-5881112-20121218062601

Well, who ever it is might not come back. I am guessing that the book after the House of Hades will have something to do with the person who is trying to get out of Tartarus, and that House of Hades will end when the person gets trapped inside Tartarus.