Books are good for building theoretical knowledge, and it is important but not as important as practical knowledge. When I was just starting my way as an SEO manager, I paid much attention to practical knowledge. The best way to acquire practical knowledge is to work with professionals, see what they do and ask questions. Thankfully, I was accepted to belkins.io as a beginner and could watch professionals work and make notes. This was much more useful for me than all the theoretical reading I did before, and the knowledge I got back then is still relevant to me.