Peaceful sleep is a challenge to achieve now a days. OSA has posed a worrisome question mark on the concept of peaceful sleep. Treatment of obstructive sleep syndrome is the most controversial, confusing of all diseases that we treat as Orthodontists. Through this book we continue to introduce many innovative techniques that have proven beneficial to patients.In this edition of the book, we have included the epidemiology, pathophysiology, risk factor associated, diagnosis and finally management option of the same through various means. We must understand that surgery is only salvage for those patients who fail non-invasive treatment. It is therefore crucial for the treating doctor to be an expert in its surgical and non-surgical treatment. Our approach must be comprehensive. This book therefore is comprehensive in presenting both surgical and non-surgical treatment.This book will also guide when to start with surgical means and which all are the best patients suitable for different treatment options available.I believe that the combination of expert opinion complemented by clear illustrations help make this book a unique and useful guide for every sleep doctor.