Eric Freeman is enjoying taking all the pixie dust from his four years as a Disney executive and applying it to his passion, computer science. He recently co-authored Head First Design Patterns for O'Reilly (and never had so much fun). He previously co-authored JavaSpaces: Principles Patterns and Practice. Before Disney, Eric worked closely with his mentor, David Gelernter, on technology and startups. Eric holds a Ph.D. from Yale University in Computer Science and has been honored by an MIT TR100 award, as a top technology innovator.