User blog comment:Hyperborean/"The House of Hades" – official expectations blog/@comment-4485028-20130901011107/@comment-10750309-20130901065944

1) There is a high chance of having Roman narrators

2) Nico will not have a POV

3) There will be a giant turtle in the book (limited edition inside cover)

4) Annabeth's birthday will be revealed

5) Reyna's surname will be revealed

6) We will be having some scenes in Tartarus

7) Rachel and Octavian will meet ( I just don't know if it is in HoH or in Book 5)

Just ask the others for more details.

I also like the House of Hades cover. And it would be much better if they include all the seven demigods in the cover of Book 5.