If you've attended any of my workshops and wanted to know more, this book goes deeper on how to market your small business. Beyond social media marketing, it helps you make decisions about advertising and PR, the right media to choose, how to allocate your money and time, and so much more.

These guys wrote the definitive book on the subject.

Lots of pictures drive home the points made in this book to improve usability and user experience of your website.

The grandaddy of marketing, this is the most recent version of his book. It's the marketing bible, according to Kotler.