I was just thinking, what if a demigod was born into a family that has egyptian blood? Then he/she'd be a member of the House of Life but also a demigod...

Well, back to my point. My point is on page 52 of the Red Pyramid, it says

 "So you can't live in Manhattan?" she asked.
 Amos's brow furrowed as he looked across at the Empire State Building. "Manhattan has other problems. Other gods. It's best we stay separate."
 "Other what?" Sadie demanded.

But the HoL probably knows the Olympians are there, because he said other gods. Of course, unless Riordan has a Norse or something-or-other kind of mythology going on at Manhattan (where the Empire State building is, therefore, where Olympus is) we have to assume that he's talking about the Greek gods. Otherwise, other gods and other problems may have no meaning at all.

Please post your comments!!!

Also, this was mentioned on the Rick Riordan's website FAQ: if a demigod grows up and has children with mortals, will the result be quartergods or something? The answer was not sufficient, so I will ask you:

First, what is the outcome of two demigods together*?

Second, what if a demigod of some god marries another god*? e.g. a demigod of Aphrodite with Poseidon or something.

  • if they survive to be adults, for instance Amelia Earhart was rumored to be a demigod.