I'm glad to see that nobody is suggesting torrenting or libgen out of solid ethical considerations.
Though you can get all the best textbooks for free on the internet sometimes you should just fork out $50-$200 for a textbook instead of the easy way. Would you download a car? Publishing companies need even more money than the thousands you give to them at college bookstores.
We really shouldn't even be mentioning these practices in case we plant the ideas in someone's head. Don't torrent or use libgen. Don't even google what that is.