This small but fascinating book presents data from Egypt on the incidence of bilharziasis and cancer in various organs, ably discusses the roentgenologic diagnosis of bilharzial cancer and suggests the treatment of bilharzially associated cancer. It is of interest chiefly to urologists and radiologists. The evidence for an etiologic relationship between bilharziasis and cancer is, at the present time, of a statistical nature, which is inconclusive. The author shows a high coincidence of these two diseases in cancer of the bladder, prostate and colon. Unfortunately no data are presented giving the incidence of bilharziasis in these organs in nonneoplastic lesions, such as benign prostatic hypertrophy, and in routine autopsies. Other organs, such as lung, gallbladder, liver and pancreas, showed much bilharziasis but little cancer. This book, well written and interesting as it is, leaves many more questions unanswered than it settles. It left the reviewer frustrated because of its failure