Book excerpt: Gregg (archaeology, Southern Ill. U.) argues that the transition from hunter-gatherer societies to settled agricultural communities in prehistoric Europe involved a wide variety of interactions for over a millennium. She considers the ecological requirements of crops and livestock, develops a computer simulation to identify an optimal farming strategy for early Neolithic populations, and models the effects that interaction with the farmers would have had on the foragers' subsistence-settlement system. Annotation copyrighted by Book News, Inc., Portland, OR