For 25 years, James Tamm ’75 served as the San Francisco regional director and a senior administrative law judge for California’s Public Employment Relations Board. Tamm mediated more than 1,500 employment disputes, including more school labor strikes than anyone else in the country. His new book, Radical Collaboration: Five Essential Skills to Overcome Defensiveness and Build Successful Relationships (HarperCollins, $24.95, 2004) draws on his years of experience as a judge and mediator to offer readers guidance on creating effective collaborations.