Based on interviews with 125 prison workers and participant observation, this in-depth study examines the prison worker's world as a foundation for a theory of social control. By analyzing the intricate relations among the workers themselves rather than among the prisoners, Barbara Owen posits that social control arises through the combination of interaction, power, and meaning. Owen argues that the motives of workers are practical, rather than pathological as suggested by earlier research. She focuses her study on the social context of the prison shop floor--challenging the accepted idea that prison work is difficult because of the prisoners. The findings indicate that the problems of the prison workers are structurally induced and arise from interaction with co-workers rather than with prisoners.