This book is a combination reference source and textbook on the subject of extracorporeal circulation primarily as it is used for open heart surgery for the correction of anatomic cardiac defects. The book is extremely well organized and covers history, basic principles, inherent problems, and current state of developments of a wide variety of problems connected with extracorporeal circulation. The effort is extremely well organized and is very thorough. In addition to logical organization there are extensive welllabeled illustrations of physiologic principles and mechanical apparatus. There is frequent summarization. The bibliography is very thorough and current. The book appears to this reviewer to be an excellent coverage of the new and multifaceted problem which should be of value to all who are involved in the management of patients subjected to this technique. In addition, it is an excellent treatment of the physics and the physiology of the cardiovascular system.