Novel drugs are being developed which interact with the programmed cell death (apoptotic) machinery in cancer cells, thereby causing these cells to commit suicide and to be removed from the body. Research is also directed to investigate why the cancer cells sometimes lose the ability to undergo apoptosis after a certain period of time and methods are being developed to reactivate this cell death process. This book is intended for workers in the field and clinicians as a useful guide of the state of affairs in this exciting field which may offer more effective possibilities for treatment of cancer patients. Mels Sluyser is the Editor of the journals APOPTOSIS and ANTI-CANCER DRUGS. He brings together a collection of papers written by the worlds leading experts in these fields.