For each business listed, the authors provide a short description, an explanation of "why" it's a good pick, the skills necessary, the initial investment required, resources for more information and a brief dialog with even more information. This book will guide you to making a wise choice.
You can skim the choices listed in the table of contents and then read the details on those that sound most interesting. Or you can read all of them. Either way, you're sure to find some you'd never thought of and perhaps even eliminate some you'd been considering.