User blog comment:Hyperborean/"The House of Hades" – official expectations blog/@comment-4902593-20121027133545

Do you think Calypso might make an appearance ? Because Rick Riordan himself said it and as HoH is the fourth book in The Heroes Of Olympus (Calypso appeared in the fourth book of Percy Jackson and the Olympians, remember ?). Also I hope Percy gets a chance to prove himself powerful or cool in this book unlike MoA. Wonder why Rick chose Hazel over Nico for the prophecy of the seven (cause Nico's way too cool and powerful). I am really curious to know what is inside Tartarus.