Ryan Holiday's book explains the concept of growth hacking and the mindset one needs to think of marketing in the modern world. His advice is applicable to businesses of all kinds, but especially if you're trying to reach a consumer base with your ecommerce store.
Joe Pulizzi explains the science behind how to attract prospects and customers, by creating content and sharing information that they care about. The book highlights the process of developing stories that can be used to inform, entertain and your compel customers to take action, without you actually telling them to.
A step-by-step, encyclopedic reference manual by Steve Blank and Bob Dorf on how to build and scale a successful startup. Best to read this book in parts and reference it whenever you need help with a particular section.
Coming up with great product or brand names is hard. Alexandra Watkins shows you the SMILE and SCRATCH methodology to create memorable and effective brand names, even if you're a noncreative.
Learn the path Tony Hsieh took at Zappos, which he joined and became CEO after selling LinkExchange to Microsoft, to grow the company to over $1 billion in gross merchandise sales in less than ten years. A great book on creating the a strong and customer-oriented company culture.
Great marketers don't use consumers to solve their company's problem; they use marketing to solve other people's problems. Seth Godin's book is a culmination of decades of experience to help people understand marketing and apply its core ideas to their own businesses. A must read book on marketing.