Reading is fundamental to understanding, growing, and maintaining a business of one. Why? Because what will grow, more than anything in this process, is you.
Here are a few books that I have read, loved or loathed, and at the least recommend you add to your TBR (to be read) pile.
Not all of them are business books. Why? Because you are more than your business and the most education you will receive (and need) is non-business related.
As a business owner, you need to understand what makes you tick and accept all of those parts.