At the end of every project, I am acutely aware that I could never have reached the end without the grace provided to me by God through my Savior, Jesus Christ. I hope He is proud of how I have spent my time. I am also very conscious of the patience bestowed upon me by my wife, Kristi, who is always there to listen when I need to talk and laugh when I need a smile. Thank you.

There is a long list of people who have helped make this book possible. I do not claim that this is a complete list. Mike Loukides has shown almost as much patience as my wife waiting on this book to be completed. I am in great debt to the technical reviewers who each provided comments on some version of this manuscript: Robbie Allen, David Blank-Edelman, Æleen Frisch, Robert Haskins, Luke Howard, Scott McDaniel, and Kurt Zeilenga. Thanks to Æleen for convincing me to do this (even if I complained more than once). I must also mention the various coffee shops, particularly the Books-A-Million in Auburn, AL, that have allowed me to consume far more than my fair share of caffeine and electricity.

Finally, a huge amount of recognition must be given to the developers who made various pieces of software available under open source and free software licenses. It is such an enjoyable experience to be able to send and receive feedback on problems, bugs, and solutions. Any other way would just be too painful.