User blog comment:Menara/The Son of Sobek: The official PJ and Kane Chronicles Crossover/@comment-122.164.234.74-20130211171738/@comment-1515612-20130217084551

Equally as confused. HoH is for House of Hades and HoO is for (Hereos of Olympus). HoH is not the last book in the HoO series. HoH is the fourth one, so it couldn't possible be after that without spoiling the rest of the HoO series.