First and foremost, I would like to thank my husband, Shvet Jain, for standing beside me throughout my research career so far and editing this book. He has been my motivation for continuing to improve my knowledge and move forward in my career. He is my lifetime achievement, and I dedicate this book of mine to him.

Moreover, without the prayers and best wishes of my parents, my sister, and both of my sons, none of my achievements would have been possible.

I am also thankful to the Wiley editorial team and my co‐editors, Dr. Neeraj Kumar, Dr. R. Maheswar, and Dr. Syed Hassan Ahmed Shah, who really helped me in every aspect in the preparation of this book. Their prompt response and care to the literature and contribution is remarkable. They are great and responsible researchers indeed.

I would also like to thank each and every one behind the completion of this book, especially Dr. Syed Hassan Ahmed Shah, who actually helped a lot, and without his quick and efficient efforts, it wouldn’t have been possible to get our book published. He motivated and gave me this platform to go ahead.

Last but not least, my gratitude is due to my inspiration Dr. Archana Mantri, Vice Chancellor, Chitkara University, Punjab, for her trust in me and for making me confident that I can put efforts to be successful in each and every field.