AS a coder I never knew how important and hard it was to get the right msg out... these 3 books helped me a lot ! http://StartupMarketingBooks.com
@rawoke083 I'd recommend you also check out 'Marketing for Developers' (https://devmarketing.xyz/) by fellow IndieHacker @mijustin.
The book is good, the video course is better. Puts everything in context. Don't get me wrong, I'm a big fan of business books like the 'eMyth Revisited'. However, since most IHers fail in their business because they don't understand marketing, I think Justin has helped to level-set developers to understand how to build and promote their product(s) in simple ways that are achievable by anyone.
HTH.
P.S. I've recommended Justin's work twice today on IH. I am NOT paid for my endorsement. I bought his course myself. As a fellow IH (and Canadian) I just like to help those who I feel helped me.