Looking for ACTUALLY USEFUL books to read for building my first tech startup

I’m in the early stages of building my first tech startup (pre-seed funding, small team), and I’m looking for books that offer **practical, no-BS advice** for founders. Not books that will be useful when I reach $100M ARR, not books to help me manage 100 employees, and not inspirational biographies of successful people. Nothing against those—but I need books that are useful **now.** If you’ve built or are building a startup, what books have genuinely made a difference for you? I’m especially looking for books that opened up things you didn’t know you didn’t know - the scary unknown unknowns.