Okay, just to get things out of the way and less confusing if you saw Darkness and Sea, this book has nothing to do with that.
I had authors block with it and it was driving me nuts, and then I had the idea of instead making Nico and Percy catch feelings for each other during the PJO series, so where as Nico has feelings for Percy, like he said in HoO, Percy is having feelings for Nico.But ya, this has nothing to do with Darkness and Sea except that it's a Percico story.