I love the idea that there’s a place in my town where I can walk in, grab as many books as I want, and borrow them for several weeks at a time. From this same place, I can borrow audio books, guitars, and ukuleles as well! From a self-improvement standpoint, I can think of no place more beneficial than your local public library.
If you love to read and/or consider yourself a life-long-learner, I suggest (if you aren’t already) to make frequent visits your public library.
What a blessing to have such a wonderful gateway to learning right in our own towns!