Self help books exist to provide motivation and moral support to what you've already decided you want to do. The best books to learn how to do things vary of course. The problem with going from books is that often the best information is outdated by the time it gets into book format. Look at the blockchain space for example and see for yourself that by the time it gets into a book it's already a few years old. The best way to get knowledge is not to just read books but to observe people and do what you see working.
If someone else is doing something and you can see them getting a lot of money doing it then you can do the same in a lot of cases. Of course you never want to copy someone exactly but once the formula for success is discovered you can run with it and add your own uniqueness.