Book excerpt: In Walking With Abel, journalist Anna Badkhen joins a family of Fulani cowboys as they embark on their annual migration across the Savannah. Although their present is increasingly under threat from Islamic militants, climate change and urbanization, the Fulani are no strangers to uncertainty - brilliantly resourceful and resilient, they've contended with famines, droughts and wars for centuries. Dubbed 'Anna Ba' by the nomads, who embrace her as one of theirs, Badkhen narrates the Fulani's journeys with compassion and keen observation.