This book has great pointers on ways to think about using Google differently. If you're not familiar with the advanced technical searches possible through the Google interface, this book will likely be an eye opener. Having used Google before it was popular and having learned most of the advanced search features as they were introduced, this book provided insight into merging some of the techniques I already knew to various situations, where in the past I might have written my own program before to perform the same task. Definitely a time saver. Though it says it's for Penetration Testers, it's really for anyone who has a website or information about themselves that exists on the Internet. Excellent read, and the authors provide nice chapter summaries, so it reads considerably better than most textbooks. Could probably be read in an afternoon.