I've got a reserve on a library book I'm desperate to read. The previous person is now a week overdue. AIBU to think this is selfish? If you can't return your book on time that you have borrowed for free from a public library you shouldn't have taken it in the first place. If you can't read a book in 3 weeks and are relying on being able to renew it you should blinking well buy it or just accept you'll have to finish it when it becomes available again.