Willie Olivier has explored the highways and byways of southern Africa on foot, by road and by four-wheel drive for the past five decades. Based in Windhoek, Namibia, he is the author of numerous books, including African Adventurer's Guide: Namibia, Hiking Trails of South Africa and Touring in South Africa. Ute von Ludwiger is a tour guide and wildlife photographer, working in both Namibia and Botswana. She is based just outside Etosha National Park, from where she takes regular guided trips into the park.