When a book is actually "banned", you get thrown in jail for downloading an illegal copy from libgen or conspiring to distribute photocopied samizdat. Consult the United Kingdom for examples.
Essentially every country in the world aside from the United States (particularly Europe and UK/AU/NZ/CA as I mentioned) actually bans particular books for real, well beyond "you can't buy it with tax dollars, you can buy a copy at any bookstore though".
What would you call it when the government tells a library to remove books?