“…Navigating this ever-changing field is the major purpose of this ERS Monograph, through summarised information on all major pleural diseases, written by experts in the field who have often contributed directly to the evidence base. The Monograph therefore covers aspects of background and investigation, including epidemiology [1], physiology and its relationship to symptoms and management [2], basic science and animal models of pleural disease [3], the role of radiology [4] and ultrasound [5], which is now considered an essential tool for pleural disease management. We have also included chapters on the major pleural entities including pleural infection [6], MPE [7], mesothelioma [8], pneumothorax [9], TB [10] and non-specific pleuritis [11].…”