I would like to thank my wife, Vishalakshi, for putting up with my late night writing sessions. Even though Vishalakshi is from microbiology background, on my request, she proofed all the chapters to spot language shortcomings. She patiently read my complete book, and even after not being a programmer, she gave me many valuable suggestions. Without her support and continuous motivation, this book would not have been possible. My professional friend, Kuldeep Vaity, has also read all chapters from a developer's perspective. His feedback was very valuable from technical angles, such as unclear code, insufficient explanation, and similar.

I feel proud to say that the book's cover picture was designed by my daughter, Roopali. She conceptualized the theme and took a lot of effort to properly convey the meaning of the book to readers.

My special thanks to the technical reviewers of the book. Their valuable suggestions have helped me add value to this book.

I would like to thank the entire Packt Publishing team. I would especially like to thank, Aditya Nair and Nikhil Potdukhe of Packt Publishing for the positive, motivating support given to me during the initial period to the end of the completion of this book. Nikhil was very helpful and patient in following up with me for chapters. Due to my busy schedule of consulting and training activities, I was not able to complete my chapters as per schedule; but Nikhil used to follow up very nicely, understandingly, and patiently for the chapter's completion. Without his patient follow up, either I would have completed this book very late, or I would have left the writing work incomplete.