We would like to thank our families and friends, especially Manu Singhal, who saw us through this book, provided support, talked things over, read, wrote, and offered comments, without which conceiving this book wouldn't have been possible.

Also, we would like to thank Usha, Anugya, the entire team at Packt Publishing, and specially Joel Noronha who allowed us to quote their remarks and assisted in the editing, proofreading, and design of this book. Writing a book is a long and arduous journey, but you all made it so easy for us.