Recommendations for actionable marketing books?

Hey everyone, I'm an engineer turned entrepreneur, built the first SaaS product and beta launched it with 300+ users onboard doing things that do not scale. Now I'm preparing for my next big launch on Product Hunt! I'm halfway through the Traction by Justin Mares and Gabriel Weinberg. And I understood that early-stage startups should do Direct Sales and SEO on priority. Looking for a good book recommendation to learn about marketing SaaS products. Join us at our upcoming page: https://www.producthunt.com/upco...