Barry Green, a native Californian, served as Principal Bassist of the Cincinnati Symphony for twenty-eight years. As former Executive Director of the International Society of Bassists, he is currently directing a young bassist programme for the San Francisco Symphony Education Department, teaches privately at Stanley Intermediate in Lafayette and at the University of California, Santa Cruz, and has organised the Northern California Bass Club. Since the age of fifteen, W. Timothy Gallwey has been fascinated with the problem of how human beings interfere with their own ability to achieve and learn. His search for practical ways to overcome mental obstacles and establish maximum performance has led to a number of books on such diverse subjects as sports, management and work. He lives in Los Angeles.