In this highly readable and thought-provoking work, Nick Dyer-Witheford assesses the relevance of Marxism in our time and demonstrates how the information age, far from transcending the historic conflict between capital and its laboring subjects, constitutes the latest battleground in their encounter.   Dyer-Witheford maps the dynamics of modern capitalism, showing how capital depends for its operations not just on exploitation in the immediate workplace, but on the continuous integration of a whole series of social sites and activities, from public health and maternity to natural resource allocation and the geographical reorganization of labor power. He also shows how these sites and activities may become focal points of subversion and insurgency, as new means of communication vital for the smooth flow of capital also permit otherwise isolated and dispersed points of resistance to connect and combine with one another.   Cutting through the smokescreen of high-tech propaganda, Dyer-Witheford predicts the advent of a reinvented, "autonomist" Marxism that will rediscover the possibility of a collective, communist transformation of society. Refuting the utopian promises of the information revolution, he discloses the real potentialities for a new social order in the form of a twenty-first-century communism based on the common sharing of wealth.       Nick Dyer-Witheford is an assistant professor in the Graduate School of Library and Information Science at the University of Western Ontario.