Braam van Wyk gained his doctorate from the University of Pretoria, where he has been a lecturer since 1977. He is currently Professor of Botany and Curator of the H.G.W.J. Schweickerdt Herbarium. His books include Photographic Guide to Wild Flowers of South Africa (Struik, 2000) and How to Identify Trees in Southern Africa (Struik, 2007). Piet van Wyk (1931-2006) was a graduate of Potchefstroom University, and worked as a biologist with the Kruger National Park's research team. Among his published works are Field Guide to the Trees of the Kruger National Park (Struik, 1984) and How to Identify Trees in Southern Africa (Struik, 2007).