User blog comment:Hyperborean/"The House of Hades" – official expectations blog/@comment-4430596-20130111225648

I dont think we are going to see Annabeth and Percy in this book, at least not until the end, maybe. I think Rick will take the time to focus on other characters. Plus, it would be near impossible to acuratley write the horrors of Tartarus. In addition, we have Katropis and dreams to keep us informed.