Early in your career, yes. As you dig deeper they become available only in university libraries and then not even there.
Most material is available for free on the internet, but like most open source material, you have to compile it yourself and that takes time. Good books save you the time by including important dependencies, normalizing notation, etc.
Most material is available for free on the internet, but like most open source material, you have to compile it yourself and that takes time. Good books save you the time by including important dependencies, normalizing notation, etc.