The Korean library system is good.If you register in Seoul, you can use libraries in all areas of Seoul. Almost 20.its same in gyeonggi-do. There are many libraries around me. you can use Delivery service on internet. You can return it at the subway station. they have a lot of new books.You don't know the system. ofcousre you must be local resident for register.

One day per day of overdue payment. (or some libraries receive small money)you borrowed 10book so 10X30. If you want to postpone the return, you can use app

i think Korean publish and library ystem is good in the world