I thank my wife, Harini Vepakomma, in facilitating and supporting me in writing this wonderful book. I appreciate my loving son, Sri Vishnu Sushane Vepakomma, who allowed me to concentrate on writing the book instead of spending time with him. I also thank the Packt Publishing team for providing me with this opportunity and their support. I am grateful to everyone in my career who helped me gain knowledge and build my personality.