Lipid-derived molecules are increasingly appreciated as key regulators of cell responses and signal transduction. Sphingolipid-derived bioactive molecules are emerging as critical regulators of some of the most exciting and, until recently, poorly-understood areas of biology such as growth suppression, programmed cell death and tumor invasion. Written by leading investigators in these areas of study, this book presents a thorough, current and accessible review of how sphingolipids function to regulate these important activities.