User blog comment:Menara/The Mark of Athena Character Art Revealed!/@comment-3146930-20120821215324/@comment-3146930-20120822185931

Spoilers!

But think about it. Yes Percy talks about him as he was his favorite hero until he found out what he did to Zoe, but Hercules himself is never mentioned. I mean think about it, they only ever talk about him when referring to his mortal life, he never is mentioned as being on Olympus, he was never mentioned fighting alongside the gods during the Titan war, and now during the Second Gigantomachy, where Hercules helped fight a bunch of the giants during the first one, he doesn't appear until book 3. I mean why did it take Rick this long to include him when he is one of the ancient heroes that everyone knows.