To Jesus Christ, my only source of eternal life and purpose.

To my beloved wife, Erica—thanks for your love and for sharing your life with me.

To my adorable daughter, Rebeca—if this book helps a single person, maybe it could help to turn the world into a better place for you.

To the memory of my mother, Matilde, who I miss every day.

To my brother, Marco, who introduced me to this incredible world of computers and software.

To my friend and guru, Bruno "Javaman" Souza—I would probably never have written this book if I hadn't met you.

To the amazing team at SouJava—you folks really live the community thing.

To my peers at TCDB for all encouragement, tips, sharing, and feedback. Thank you!