I purchased this book as part of ongoing research; I don't have a business yet but I'm doing my best to learn about business in general.
Seth Godin has a conversational writing style that makes the book easy to read and makes the information he gives easy to understand and remember. He breaks down the big idea of "starting a business" into many smaller parts, and offers advice and anecdotes along the way. It is not a comprehensive tome of knowledge - it's a short little book that you could probably read in a week even if you read slowly. But it does have plenty of information, and points you towards sources for more specific information.
This isn't a book about specific business, either; Godin makes a point that he is not attempting to do anything other than give some general information that every business owner should find useful. It's also not a "for dummies" type of help book - no big lists of "how to do this, step by step." It's just not that kind of book - Godin writes in a voice that fully expects the reader to figure out the steps for herself. I found it refreshing to read an informational book that treated me as an adult, without also treating me like I already have a two-year business degree.
So if you want a book that will tackle the initial questions you might have about starting a business, this is a good choice.