What do you do with your old textbooks?
DH and I are cleaning up the house/getting my remaining crap out of the storage locker/making room for people to store crap in our shed and have come up with the issue of text books. We have a lot of them.
Many of my textbooks are 5-10+ years out of date. They have no value for resale online, thrift stores won't take them, libraries don't want them. We can toss them in the recycling but it seems like a bit of a waste. It's easy to get rid of novels, cookbooks, etc. but this is much harder.
What do you do with your old books?