Toby Green (King's College London) on his recent book The Rise of the Trans-Atlantic Slave Trade in Western Africa, 1300-1589. Green discusses periodization, sources, and the creation of creole communities in the Upper Guinea coast. He also comments on new research comparing Upper Guinea and West-Central Africa and concludes with a reflection on the opportunities and challenges of doing research in Guinea-Bissau. Walter Hawthorne is guest co-host.