Writing "Echo: Convergence Chronicles" has been a journey filled with challenges and discoveries, and we owe a debt of gratitude to many individuals who have supported us along the way.First and foremost, we would like to express our sincere appreciation to the team at Chandigarh University for fostering an environment of innovation and creativity. Special thanks to our colleagues and mentors who have provided valuable insights and encouragement throughout this endeavor.We are also grateful to our families for their unwavering support and understanding during the countless hours spent researching, writing, and refining this book. Their encouragement kept us motivated during the most challenging moments.To the readers who embark on this adventure with us, thank you for your curiosity and imagination. We hope that "Echo: Convergence Chronicles" transports you to new realms and inspires you to explore the limitless possibilities of virtual reality.Lastly, we extend our heartfelt thanks to each other for our collaboration on this project. Ms. Divyanshee Jain's creativity .