Dave Jacke has been a student of ecology and design since the 1970s, and has run his own ecological design firm--Dynamics Ecological Design Associates--since 1984. Dave is an engaging and passionate teacher of ecological design and permaculture, and a meticulous designer. He has consulted on, designed, built, and planted landscapes, homes, farms, and communities in the many parts of the United States, as well as overseas, but mainly in the Northeast. A cofounder of Land Trust at Gap Mountain in Jaffrey, NH, he homesteaded there for a number of years. He holds a B.A. in Environmental Studies from Simon's Rock College (1980) and a M.A. in Landscape Design from the Conway School of Landscape Design (1984). You can learn more about his work at edibleforestgardens.com. He lives in Keene, New Hampshire.

Eric Toensmeier has studied and practiced permaculture since 1990. He is the author of Perennial Vegetables and coauthor of Edible Forest Gardens with Dave Jacke. Toensmeier has worked as a small-farm trainer at the New England Small Farm Institute, has managed the Tierra de Oportunidades new farmer program of Nuestras Raices, and is a graduate and former faculty member of the Institute for Social Ecology in Plainfield, Vermont. His current interest is in large-scale permaculture farming as a carbon-sequestering solution to climate change. Toensmeier's writing, consulting, and teaching business is based at www.perennialsolutions.org, where he posts his latest articles and videos. He lives in Holyoke, Massachusetts.