The modern method of dealing with narrow subjects in monographic form undoubtedly fills a real need. Unfortunately, however, under present economic conditions such books seem to have so small a sale that except as a labor of love on the part of the author there is some question as to whether they serve much practical purpose. The present small volume deals in an interesting and authoritative way with the various types of colitis. Dr. Bargen naturally emphasizes his own work, with which some are not entirely in accord. However, an immense amount of useful material founded on wide experience is assembled here.