Cancer is one of the major causes of death worldwide. Despite hundreds of clinical trials currently in progress for cancer patients, the success rate is still very low. Understanding the molecular aspects of cancer development, the discovery of new molecular targets and rational drug design on this molecular basis should help in discovering early cancer biomarkers as well as novel therapeutic drugs. This book describes various cancer topics on a molecular level and integrates information on the relationship between causes of cancer, cancer cell biology, metastasis, cancer prevention and drug design. This book should prove to be an extraordinary reference text for students, physicians and oncologists.