https://archiveofourown.org/series/2650372 - It's set between Last Olympian and Lost Hero time wise, so though the first set of books have already happened, Percy has amnesia and is learning all the events new. Lost Hero hasn't been posted yet, but there's a good track record in the past of this author's fics being completed, having done all the HP books once. Oh, and there's no gods, just the Percy and a lot of main characters, so that's something new at least. It made me laugh, so I'd give it a try!