If it is a "lent" book, there is a column at the back that says "reservation". If you click "Book", another dialog box will pop up. You can fill in your own information, such as the place to pick up the book, email address, mobile phone and so on. I'll email you when someone returns the book. This can be done no matter which library the book is stored in.
If the book says "in the library", but it is not stored in the Jiangan Library, you should write down the book's name, call number and other information on paper and give it to the manager of the lending office, who will help you transport the book from other libraries to the Jiangan Library. What you need to pay attention to is that you usually go to the library after 3 days to ask, and they have a booklet to record whether the book you ordered has arrived.
I hope my answer can help you! Blessing, schoolmates!