I would recommend The Power Law[1], especially if you don't have any exposure to the startup/VC ecosystem. Contrary to what should be the ideal case, a founder needs to cater to VCs and their perspective of looking at products, just as they must cater to users.

I feel like I would have saved myself a lot of stupid conversations if I had the context this book provides.

[1]: https://www.goodreads.com/book/show/61403389-the-power-law