The invisible hand here is not tyrannical supply-and-demand, but the flesh and bones of child workers. In order to make these children visible, Grier (government and international relations, Clark U., US) examines their role as a distinct group of workers in the capitalist sector of the economy of Southern Rhodesia, from the imposition of colonial rule in 1890 to the eve of the nationalist struggle in the 1950s. She also describes the pre-colonial roles of children and how they were adopted into the settler-controlled colonial labor force. Annotation 2006 Book News, Inc., Portland, OR (booknews.com)