Yep, I don't believe they're will be any books, but however, I do know James Patterson is working on a movie that will be realesed in either 2013 or 14
Um, the last book was called Nevermore. There are going to be no more books but there is planned to be a movie and there are the manga books. The movie was planned to come out in 2009 or 2010 but was delayed because they had to rewrite the script under cause of "there wasn't enough action". The latest delay was because they fired the directer and had to, once again, rewrite the script. It is unknown what the actors are. But on youtube there are fanmade trailers and my favorite Maximum Ride: Erasers and Max by MainstayPro.