Some people prefer reading books more than listening. I listened to books only once when I tried to learn Spanish. It’s convenient really. You don’t need to take a book with you and ruin your eyesight. Recently when I was looking for information about religion and spirituality for my grandma I have found so many audio books that now when I am driving a car I listen to Dean Koontz. For me it’s the optimal variant as usually I have no time to read but like reading.