Bronchoscopy means pictures: but to comprehend an image we have to learn to see. These excellent photographs, all taken by the author himself, not only instruct us in the art of seeing just about all there is to see in the bronchial system but also illustrate many relationships between visual appearances and the clinical situation. They go even further in correlating bronchoscopic findings with the function of the lung. Treated in this way, the image comes alive. Anyone who has come to know DE KOCK as a brilliant clini­ cian, or who has worked with him in the lung function labo­ ratory - he has made important contributions in this field also­ would have expected him to produce a monograph of this calibre. Now we have such a book. It contains the selected results of many years' solid work. Due attention is, of course, also accorded the merits of the various bronchoscopic techniques which provide the essential background to satisfactory results. In writing this book DE KOCK has succeeded in projecting a vivid image of the bronchi and the functional lung into our mind's eye. This work undoubtedly opens new prospects in improved care of our patients.