This book covers how to use the new social network Google Plus for your business - I particularly recommend it for small businesses. It has a limited number of screen shots and tutorials so you will need to supplement it with one of the other books in this list if you are looking for practical 'how to' tips.
This book is especially helpful for the visual learner and will help you quickly understand how to navigate Google Plus for personal use. However this book does not cover the use of Google Plus for business or Google Plus business pages
A helpful primer book on how to get started with Google Plus as a personal social network. It does not cover how to use Google Plus for your business or Google Plus business pages however.