If your library doesn't have a book you want - REQUEST IT!
They may just decide to buy it instead of shipping it in from out of state. I requested all 3 of Yarn Harlot's books and they bought one and are on the look out for her newest.
Plus I took every chance at renewal & return time to tell them the 2nd book (Library Interloan shipped from 4 library hours away) was so laugh out loud funny they needed to buy it! Watching to see if they do so I can take "credit". (Shared it with my mom and the only complaint is the printing was too small & fine for eyes with issues! She has to use a magnifying glass for anything not big print.)
Several times lately when I've requested a book they've just bought it instead of shipping in from another library.
Knitters visiting the library behind you will thank you - even if you hog it with renewals at first!!