I would like to thank Packt Publishing's team, Llewellyn Rozario, Tushar Gupta, and Adrian Raposo, for giving me the opportunity to write this book. Also, I would like to thank David Ryan Speer and Rohit Mukherjee for their invaluable feedback. I thank my older brother, Reynaldo Reyna Jr, and my father, Reynaldo Reyna, for helping me build RetroSoda 3 years ago; without RetroSoda, I would have never invested so much time in learning how to program. Also, I thank my mother, Elsa Mireya Vazquez, for her constant support in my endeavors and my fiancée, Eugenia Perez, for giving me a reason to accomplish greater goals.