Kenya was where the term "informal sector" was first used in 1971. During the 1980s the term "jua kali" -- in Swahili "hot sun" -- came to be used of the informal sector artisans, such as carworkers and metalworkers, who were working under the hot sun because of a lack of premises. Gradually it came to refer to anybody in self-employment. And in 1988 the government set up the Jua Kali Development Programme. In this remarkable book Kenneth King...