Did you try reseting the world? You need to type "resetSim *" (without quotes).
If that doesn't help you could go into edit town, remove the bookstore and put it back again on the same lot. I mean, don't replace the whole lot from the bin, but go into the lot and replace the building itself. Sometimes rabbit holes get bugged somehow and replacing them usually helps. It happened to my school in Appaloosa once, also after patching, and replacing the school fixed it so maybe it will work for you too.
Good luck!