Mark Gustafson is professor of biology at Texas Lutheran University in Seguin, Texas, where he directs the environmental studies program and specializes in aquatic biology and ecology.

“This book provides an excellent introduction to most of the common plants and animals of the Texas Hill Country.   It is well-suited to the budding naturalist, visitor, or newcomer to the region.  The photos and descriptions of common trees, shrubs, wildflowers, ferns, lichens, birds, mammals, fish, reptiles, amphibians, and invertebrates, all in one volume, make this a valuable book for those who love the Hill Country.”—Steve Nelle, Wildlife Biologist"If I was going to have only one book about the resources of the Texas Hill Country, Mark Gustafson's book would be it. He not only knows what to say, he also knows when and how to say it. As a result, this is a remarkably thorough treatment of the Hill Country that is as accessible as it is informative."—William J. Quinn, Professor of Biology, St. Edward’s University"My Goal for the past two and a half decades is to help  people "see" the concepts [as in understand that they are land stewards] and in some respects this field guide does." -- Susan M. Sander, Founder, Reiverside nature center"It’s an excellent tool to have while exploring, deciding on a vacation spot, or educating yourself on Texas history and wildlife."—Review of Texas Books