Whenever I attend a business networking event and mention Twitter, I invariably get a group of people flocking to me wanting to know more about the social media micro-blogging site. They want to know “How do I get started?” “Is it really a viable business marketing tool?” and “Twitter seems so frivolous—does anybody really care about what I had for breakfast?”

Happily, I now have a useful book to recommend: Tweet This! by Jessica Miller-Merrell. (No relation to me). The answers to these questions and many more are in this handy, easy-to-read Twitter reference manual. In about 90 minutes, you can have a clear map for how to get started with Twitter, suggestions for additional tools to increase Twitter’s functionality (called third-party applications) and even an excellent list of Twitter users (called Tweeps) for you to follow.

What’s unique about this book is that it’s targeted specifically for small business owners, entrepreneurs and consultants. All of Ms. Miller-Merrell’s suggestions are framed in that context, including some great worksheets to help business owners construct a Twitter account that pays attention to their company’s marketing plan and...