Best business books for a solo founder?

Looking to expand my business knowledge while I’m building my business. Right now I’m running everything solo so I want to make sure I’m prepared for when I do eventually bring more people on board and I think being a more well rounded leader can help. I don’t have a ton of time to read right now but I am dedicated to it because I want to learn. Any ideas on what I should read and how to read faster? For context I’m building SaaS in the digital marketing space and scaling revenue quickly (current 10k mrr).