John Walker is a landscape archaeologist who has worked in the Bolivian Amazon since 1992. He earned a PhD from the University of Pennsylvania, at the Penn Museum in Philadelphia. He has written two books and many articles on Amazonian archaeology, including Island, River, and Field (2018), published by the University of New Mexico Press. Currently, he is part of an international, multidisciplinary research team that combines results from the natural sciences and archaeology to better understand how indigenous people domesticated the landscape for more than 3000 years, using earthworks and fire regimes. He teaches in the department of Anthropology at the University of Central Florida (UCF) in Orlando, where he also runs the graduate certificate program in GIS.