I used to borrow books from friends and colleagues when I started to develop interest in reading. A friend of mine who's also my mentor, Ranny Ray Codas, once told me, "It's good to invest in buying books than borrowing so you can build your own library." We never had internet before, and buying a book is like paying a lesson you could not practically have at certain times. I removed the price tag of this music book (see photo) which I bought in Philippines several years ago, but I could still remember it was around three hundred pesos only. I had no clear idea how will I learn its content but I simply trusted my gut and just figured it out later.
To make the story short, the return is about a hundredfold. Not to mention, that Fender guitar in the book photo became a reality, a lovely bonus gift from one of my guitar students that I look up to, Ken Stearns, who is also a book author. Check him out.
Up to this day, I'm still buying books that are hard copies despite the availability and easy access to many online sources. At first it's kind of hard to teach yourself with material lessons that you have to read and analyze. Also, it requires time. However, if you cannot afford to have a music teacher or just prefer to do it yourself at your own schedule, then buying books like this is still a better option. You may find Youtube music tutorials a better alternative, but for me, music books especially with audio or/and video files are more systematic and less fragmented. Besides, there are no bunch of ads and pop-up distractions like being online. So, if you are young, I encourage you to start reading and buy one. Starts with your interest. If you are already old, keep reading and learning to stay young.