Sounds more like she is frustrated because she can't get to something she wants. I've never heard of the book dropping. It must be like the can of pennies thing. In the car, is she crated? If not, do that. It is safer for her and for you anyway. Give her a Kong or snuffle mat, so if that works. In regards to being out and about, it sounds like she might need more training before you are taking her places. Is she heavily rewarded for sitting quietly by your side or standing or whatever, as long as she is quiet?