Good books for someone not trying to build a billion dollar company? (i will not promote)

I have been growing my SaaS service very rapidly, and I recently read The Lean Startup, which I loved. I was recommended 0 to 1 by Peter Thiel but it seems geared toward people trying to dominate the world (create massive monopolies etc). Not that it’s a small feat, but if I’m able to exit at like a $50-100 million valuation a few years down the line, I will do that instead of trying to get to a billion. Are there any books you recommend that focus more on the earlier startup stages and leading a company than the pursuit of building a unicorn? Maybe I’m just reading Thiel’s book wrong.