Book excerpt: Africans arriving by rickety fishing boats to the Canary Islands is an example of the dark side of migration in human trafficking, but the picture of a continent on the move also includes highly skilled professionals from Nigeria and Ghana who seek employment in universities and other professions in South Africa. On the positive side, migrant remittances are a major source of income in many sub-Saharan African countries, helping to sustain the lives of poor home communities. A major challenge now facing sub-Saharan Africa is how to attract