This book provides readers an extensive overview of recent progress in basic and clinical research on cancer immunotherapy. Thanks to rapid advances in molecular biology and immunology, it has become increasingly evident that cancer growth is influenced by host immune responses. With the success of a number of clinical trials, immunotherapy has become a promising treatment modality of cancer. This book covers five major topics, including monoclonal antibodies, biological response modifiers, cancer vaccines, adoptive cellular therapy and oncolytic viruses. It also examines the combination of different immune strategies as well as the combination of immunotherapy with other treatments to increase anti-tumor effects. Through the comprehensive discussion of the topic, the book sheds valuable new light on the treatment of tumors.