2010 i believe
yes. he is working on 2 new series.
The first book will be released near the end of 2010.
yes it is, but Rick Riordan will start a new series.
Maybe because he wants to make it another halfblood who is the child of the prophecy. Honestly, I don't know. I think that Rick Riordan is the only person alive who knows.
the new series is called the Kane chronicals
Not in this series, but many fans do believe that Rick Riordon will start a new series with the new great prophecy. Some think that it will have all new characters with appearences by Grover,Thalia,Annabeth, and Percy.
it will be called the jordanth series, there will be a new boy
He is making another Percy Jackson series. The next book is called The Lost Hero. It comes out in October.
The new series will be called 'Heroes of Olympus'.
Heros of Oylmpus
it will be released in fall 2010
the series is called the Kane adventure's and the first book in the series is the red pyramid