I've found Overdue Books all over the wasteland. It's not particularly surprising that a little thing like Nuclear War would keep people from returning things to their friendly local library, I guess. Fortunately, the Boston Public Library has an innovative and automated system to pay a bounty for the return of overdue books! It's mostly stuff like childrens toys, but I noticed one of the terminals at the Library itself had a copy of the Massachusets Journal of Surgery availiable. Sweet! Kids love anatomy!
So, anyways, it's clear that the various book-depositing-terminals offer different rewards at different prices. Where are all of the Overdue Library terminals, and which of them stock notable rewards, as opposed to standard wasteland junk, that I should be hoarding my Book Tokens to acquire?
Best Answer
Looking at the wikia and the one I found, there are multiple locations for these terminals (http://fallout.wikia.com/wiki/Overdue_book). The locations are:
For the rewards, here's a list of some of the better rewards (http://fallout.wikia.com/wiki/Book_return_token):
The rest are not that great, but the Stimpak, Jet, and Frag grenade I listed in case anyone wants them.
If anyone knows or finds good rewards at any other terminals or locations, add a comment and I can edit my answer to include the additional locations/rewards.