The fifth and final Percy Jackson book, The Last Olympian, by Rick Riordan comes out May 5th, and I saw on Twitter today that he's posted some tour dates here including some stops in Texas (although none in Dallas at the moment and that gets a big :( from Cool Kids Read).
Here are the current Texas dates:
Release party at Book People in Austin Texas (4 pm, May 5th)
Blue Willow Bookshop in Houston (May 6th)
Barnes & Noble La Cantera in San Antonio (May 20th)
There is also a cool B&N interview with Riordan here.
In this last book we're going to find out exactly what this prophecy about Percy and his 16th birthday entails and how the whole story will wrap up. Can't wait.