Yeh... I'd considered that but I didn't want to accuse the thread of trying to use books to enslave them. Like I'm struggling to come up with a good analogy* but there is something really skeevy and gross about offering them the books in order to eternally tie them to a location where they are forced to work for us. Honestly if they wanted to leave or work somewhere else I would do everything possible to help them take the books with them.
Of course there is still the possibility that their philosophical outlook changes as they spend longer interacting with other races and decide that they don't need to take all the books with them or that it is worth leaving some books behind to do something else they really want to.
*Probably for the better using analogies on the internet is a fools game.
Books or no books the We are not that mobile to begin with, the only realistic way for them to move is back into the Underway... which is to say back to the short brutish life where the only concern is survival and the only pleasure is food. The perspective that offering them a better life is entrapment is kind of warped IMO, especially if one were t actually treat them as adults, you know aware that books would make them less mobile.