User blog comment:SonOfZeus1200/The Camp Half-Blood & Kane Chronicles Series will collide!/@comment-85.167.186.222-20120509205112/@comment-4832918-20120724170947

@ 4. wikiacontributor: you are right but (I don't know if you have read all series) perhaps the series and there adventures are happening in the same time. In the CC Apophis trying to destroy the world by swalloing the sun, while in manhattan rules the titan war. Egyptians and Greeks to realise the others. And in HoO we find out that something like that had already happend the greeks and the romans were fighting the same war, not  knowing the others were there. The greek/roman world and the Egyptian cold excist side by side just like the Duat and the rearl world and were just two ways to see things.

In tLT it says that not all humans in the underworld might see the same and tToF made it clear that both are existing (see: Mad Claude).

I think perhaps Rick Riordan will do a bonus story like the demigod files.