Inter library loan means your library has 3 or 4 or more library pals in a geographic network. They trade and swap books that you request if your home library doesn't have it on the shelf. Depending on your population density, it could take a few days to a few weeks for a shipment to arrive with the stuff you wanted.
I have read many classic fishing books this way. As a cool leave-behind gesture, I insert a hand-tied fly into each book as a little book mark bonus for the next dude; and to see if anyone else is reading 'em.
Unfortunately, they are still there a year or two later when I check them out again. Oh well.....
"If you want to get laid, go to college."
"But if you want a free college education, go to your library"
----- Frank Zappa
What I lack in skill --- I make up for with enthusiasm.