This time, it's all four meeting together at once and it's in Percy's POV. Source: Rick's tour.
I can't wait. I want Percy and Sadie to like make witty comments back n forth to each other. Epic attitudes.
I'm betting it'll be released in the BOO Paperback.
This will be awesome~! Like the other two hopefully it is also going to be released as it's own ebook on Amazon with a sneak peek of 'The Sword of Summer' from the Magnus Chase and the Gods of Asgard series too...