Jim's publisher is sending him on a signing tour for a big chunk of April. I've posted all of the locations on the forum calendar, so you can check it out. The dates are listed above my post as well as on the calendar itself.
If you have questions about the signing policy, you should contact the store for details. They all handle things differently as far as how many books you can get signed, whether or not you have to buy them there, etc.
Jim would love for you to come by and see him!