In The Ethnographic State: France and the Invention of Moroccan Islam, Edmund Burke does the important work of historicizing colonial-era research on Morocco and Moroccans.
The title of A History of Borno, Trans-Saharan African Empire to Failing Nigerian State has two ambiguities. Situated in the Sahel, Borno did not span the Sahara. It was Trans-Saharan by being linked culturally and economically to the Mediterranean and the Red Sea, rather than to the Atlantic. Whether the failing state is Nigeria or Borno is also unclear.