User blog comment:Hyperborean/"The House of Hades" – official expectations blog/@comment-5604127-20130302213549/@comment-2079715-20130305110802

That sounds exactly as I described it. Pleasing Fans.

I know this isn't PJ&O. But how many of you, honestly, consider HoO completely independent series from PJ&O?

It's a continuation of story. Riordan solidified his ground with first 5 books, and now he went deeper, to further explore the world he created. But unlike his successful collegue J.K.Rowling. Riordan left out a lot of side characters. Characters that enrich the experience. Like Beckendorf, Silena, Clarrise, Grover,Juniper ...etc. had been in PJ&O.