Book excerpt: Process philosophy has established itself as one of the 20th century's prime contributions to philosophical thought and Nicholas Rescher has for many years figured among its prime exponents. His new book Process Philosophical Deliberations collects together ten studies illuminating various aspects of this many-sided philosophical approach. Among the topics treated are the nature of process philosophy itself, as well as its implementation in such areas as epistemology, value theory, moral philosophy, and the philosophy of science.