This book has been designed to provide the full description of the comprehensive management of peritoneal surface malignancies as a new emerging specialty. Combined treatment of cytoreductive surgery (CRS) and hyperthermic intraoperative intraperitoneal chemotherapy (HIPEC) introduced by our leader Paul H. Sugarbaker are performed to treat peritoneal metastases by surgeons all around the world. Therefore this book is focused on detailed surgical anatomy of the peritoneum, preoperative clinical assessment of the peritoneal surface malignancy, patient preparation and operation room equipments, different surgical procedures for CRS and reconstruction, intraoperative hyperthermic intraperitoneal chemotherapy (HIPEC) and neoadjuvant intraperitoneal chemotherapy, early postoperative intraperitoneal chemotherapy (EPIC) and molecular basis of peritoneal surface malignancies. The chapter on molecular mechanisms of the formation of peritoneal carcinomatosis provides insight into a rapidly expanding knowledge within this speciality. This book should be valuable for surgical oncologists who deal with multimodal treatment for peritoneal surface malignancies, as well as for the trained peritonectomy surgeons. For the senior surgeons, it will also introduce new techniques and approaches in this field such as dealing with the omental cakes and massive organ involvement that requires multi-organ resection.