Kotobagari is a way of saying "library borrowing" in Japanese. It is the process of going to a library, finding a book you want to read, and then borrowing that book to take home. You would need to go to the library, look through the shelves of books, find the one you want, and then ask a librarian to borrow it for you. They'll usually take your library card and check out the book for you, giving you a receipt and allowing you to take the book home. When you're done reading the book, you need to return it to the library so that the next person can borrow it.