Now you want something that can seriously hurt, got to watch what I say at school around the girls. These anatomy, physiology, and biochem textbooks at least 8-10 inches thick. Now those things hurt. The books are probably as small as they come for med school books which is scary.
I could offer as some solace a comment about the throwing limitations of the female of the species, but don't want to offend
. Anyway, at least you don't have to run far to get out of range of those monster med school books.