Bookstores are probably going to be the best place to do that. With the number of fans at the shows it will be difficult if not impossible for him to meet those requests for all. All of the book signings are on the website, perhaps their is one in your area. \
P.S.
He hates signing shit... see the video "08-06-08, 1-8" at livevideo.com, he likes photos and gifts the best...and pretty ladies.
Have a nice day! :)