Almost two decades have passed since the publication of the first edition of this monograph on endoscopic sinus surgery (ESS). Now the long-awaited, fully revised and updated second edition is finally available. The advent of this book, written by one of the pioneers in the field, was controversial but was a successful and significant milestone. Today, ESS is the worldwide method of choice for the surgical treatment of chronic rhinosinusitis; other indications such as trauma, malformations, and neoplasms have been added during recent years.