Targeted intraoperative radiotherapy is a major advance in the management of cancer patients and has been attracting massive interest worldwide following publication of the results of an important randomized controlled trial in The Lancet. This textbook is designed to introduce this innovative technology in a comprehensive manner to clinicians dealing with cancer patients. Throughout, the emphasis is on practical aspects and the text is supported by many excellent illustrations. The editors of the book have extensive experience in targeted intraoperative radiotherapy and include co-directors of the TARGIT Academy, which runs international training courses on the technology in the United Kingdom and Germany. They have brought together multidisciplinary contributors from different centers across the world who have wide experience in the field and whose work has been recognized internationally. It is the editors’ hope that this book will succeed in ensuring that targeted intraoperative radiotherapy is used effectively worldwide.