The third book has been announced as the Mark of Athena. The book is tied to Annabeth.
05.05.2012.
responsibleloyalstrategic
Leo and Piper do not die in the Hereos of Olympus.
The third book of The Heroes of Olympus series by Rick Riordan, titled The Mark of Athena has not yet been released.
No one knows yet, book 5 is supposed to come out in 2015.
No. The Roman Camp only comes up in the new series, Heros of Olympus.
The Mark of Athena.
The heros of Olympus includes Percy Jackson and some new characters
fall 2013
The Last Olympian was the last Percy Jackson book in the series, and is the last book from Percy's point of view, but he will still be a character in The Lost Hero (Heros of Olympus), which is told from third person... Well, at least, that's what I think. But the next book in the Heros of Olympus series which is going to be The Son of Neptune (I think), there will probably be more of Percy than Jason... But correct me if I'm wrong because I didn't read TLH yet ;)
The third book in the series will be named The Mark of Athena and it will come out October 2, 2012.
The NEW camp half blood series is called "The Heros Of Olympus" the first book that is coming out in late fall 2010 is called "The Lost Hero"