They're merely doing what anyone is allowed to with the books that they own, loaning them out, because copyright law doesn't prohibit that, so no license is needed.
What is in a library, you can freely read. Find the most appropriate way. You do not need to have bought the book.
¹(Edit: or /may/ not be allowed, see posts below.)
I'd be interested to know if you knew of one with bright line rules delineating what is and isn't allowed.
(I know by practice but not from the letter of the law; to give you details I should do some research and it will take time - if I will manage to I will send you an email, but I doubt I will be able to do it soon. The focus is anyway on western European Countries.)
They didn't think it would be a good idea to re-bind them and distribute it to the library or someone in need.
They did not destroy old, valuable books which individually were worth millions.
https://arstechnica.com/ai/2025/06/anthropic-destroyed-milli...
As for needy people, they already have libraries and an endless stream of books being donated to thrift stores. Nothing of value was lost here.
But then they shouldn't have done that in the first place. It seems like a crime to destroy so many books.
Imagine, 10 more companies come to join the AI race and decide to do the same.
That being said, I’m sure these companies did not exclusively buy books at the end of their life.