Steven Foster is the author or co-author of eighteen books, the latest is a new THIRD EDITION of the Peterson Field Guide to Medicinal Plants and Herbs of Eastern and Central North America (with James A. Duke, photography by Steven Foster). Why a new edition? The new edition has over 700 photographs, 88% of which are new images. The book includes 60 additional species and is updated throughout with updated scientific and family names, distribution information, and flowering times. From 2000 (2nd ed) to 2013, the medicinal plant research literature has increased by five-fold compared with ALL data published prior to 2000! Jim Duke and myself scoured the literature with an eye toward scientific and ethnobotanical/historical data that reconciles tradition with science. In addition we updated safety, toxicity, and drug interaction information. In short this is a new book, that stands alone beside the two previous editions.