I just signed a whole bunch of Pearls Before Swine and Timmy Failure books at my local bookstore and drew a character in each. To get one, just call 707-762-0563 and they will ship it to you.
Oh, and two of the Timmy Failure books contain a drawing of ME. Yes, me! If you happen to get one of those two books, call the bookstore, and they will send you a big drawing of Rat and Pig (see photo below).
As always, these signed books tend to go quick, so call as soon as you can.