Virginia Volterra and Carol Erting have made an important contribu tion to knowledge with this selection of studies on language acquisi tion. Collections of studies clustered more or less closely around a topic are plentiful, but this one is 1 nique. Volterra and Erting had a clear plan in mind when making their selection. Taken together, the studies make the case that language is inseparable from human inter action and communication and, especially in infancy, as much a matter of gestural as of vocal behavior. The editors have arranged the papers in five coherent sections and written an...