If you're looking for general entrepreneurship books Tony Robbins and Dale Carengie are very good authors. Personally, their books have helped with starting and maintaining my own business and just personal general well-being!
Check some marketing courses - that's first. Second - if you have a serious business, maybe you consider hiring a professional marketing company who will do the job for you. https://thryv.pissedconsumer.com/review.html - those are Thryv reviews for example, the company we work with for the couple of years now.