User blog comment:Menara/The Son of Sobek: The official PJ and Kane Chronicles Crossover/@comment-5593616-20130208174016/@comment-3146930-20130208234940

If it helps at all, the story could take place after the events of The Heroes of Olympus. I mean Carter mentions Percy looks about 17, and he turns 17 about a month after The Mark of Athena. Not to mention the entire Heroes of Olympus series has taken place only over an 8 month period (The Lost Hero was in December and The Mark of Athena ends on July 1st).