In September 2005 an International Meeting on "Targeted Therapies in Cancer: Myth or Reality" was held in Milan. This successful Meeting was intended to represent a forum for scientists and clinicians working in cancer drug discovery and therapy to share their reflections and experiences on how the paradigm shift from empiricism to molecular targeted therapies is contributing to the translation of basic knowledge into new therapies for cancer patients. This book collects the contributions given by scientists and clinicians, from Academia and Industry, who participated to this Meeting.