The 5th and final book is titled The Last Olympian. It is scheduled to be out May of 2009. Check the author's website (http://rickriordan.com/children.htm) for updates on any future books in the series.
May 05, 2009 - The Last Olympian
Rick Riordan, author of the hilarious series "Percy Jackson and the Olympians" HAS come out with a fifth book, the title of this suspenseful ending of an amazing series is "The Last Olympian", you can purchase this book in any of your local bookstores. The book will come out on May 15, 2009.Enjoy this exciting, unexpected conclusion to the bestselling series, it is sure to please!
Rick Riordan's new book series 'Heroes of Olympus' will be releasing it's first book 'The Lost Hero' on October 12th, 2010.
Oct. 10, 2011
it is said to be in fall 2011. maybe he will make it come out sooner.
The Lost Hero will be released on October 12th, 2010.
I think it already is, now that Mark of Athena is out!
Mark of Athena by rick Riordan is coming out October 2nd 2012
The book after the lost hero hasn't come out yet, but it's called The Son Of Neptune
The book, The Son of Neptune, is where the picture of Hazel Levesque comes out of or is seen in. It is the second book in Rick Riordan's Heroes of Olympus series.
The book will come out October 12, 2010. It is available for pre-order at amazon.com
The series ends at Book #5, but Rick Riordan is writing another book series, The Kane Chronicles.