User blog comment:Hermione Chase/"The Blood of Olympus" Expectations/@comment-10218971-20131012060028/@comment-1867880-20131012083059

"An oath to keep with a final breath" -- that could also refer to Percy's promise to Luke and Ethan at the end of The Last Olympian. I'm not sure how that would be tied together, but I think it would be nice to tie something from Percy Jackson into the series. Jason's promise to Piper in The Mark of Athena seems to minor to be it. Leo's promise to Calypso and Percy's promise to Annabeth are major, but they seem too obvious. A lot of Rick Riordan's books have interesting twists. I don't think he would do something that obvious.