In the United States, Libraries usually participate in a program called ILL (Inter-Library Loan). You can request the book be sent to your nearest branch and they’ll find a library that has it in stock. Just look up “[Your library name] interlibrary loan” in your preferred search engine
At mine the computer search will tell you if other libraries in the system have it and you can request it right there and if enough requests come up for a book they don’t own they tend to get a copy.