SINCE THE EARLIEST DAYS OF THE NATION, American workers have been viewed as primary beneficiaries of the establishment of the free public library. They have been the focus of public library development, whether for the fortification of their education or for social control, as a counter force to the upheavals of workers in Europe. At various times in its history, the public library has concentrated on workers, specifically the organized labor movement, as both clientele to be served and as partners in cooperative educational work. Although their numbers have diminished in the last decade, unions in the year 2000 still represented 16.3 million U.S. workers-13.5 percent of all working people in the U.S ("Union Membership," 2002, p. 1)-arguably a greater number of individual members than any other American social justice or secular organization. If union retirees and union households are taken into consideration, a very high percentage of Americans are indeed included, in the community of organized labor which potentially interacts with the public library. Historically, significant forms of outreach, programming, and cooperative services designed specifically for workers have been undertaken by public libraries across the country, many In: cooperation with the labor movement. In addition, public libraries have endeavored to address the needs of the American workforce both as individuals and as labor union members. In order to make these endeavors more-productive-today,the needs of the labor community, both individually and collectively, must be considered. As the labor movement itself has changed and developed, in terms of membership demographics, size, and expressed goals, the public library's service to this important sector must also grow and evolve.