Some libraries used to chain books to prevent theft

Mundane Pointless Stuff I Must Share (MPSIMS)
#1

one still does

https://twitter.com/DrLindseyFitz/status/1226167987956338689

#2

such was the fate of the Necrotelicomnicon and other such grimoires.

Note also that the chains prevented such tomes from chasing down and eating Library patrons too.