Much of his background can be attributed to his long association with Dr. Lloyd B. Sharp, founder of the outdoor education movement in the United States. Dr. Rillo has been with many outdoor environmental education programs at their outset as a consultant and instrumental in the initiation of these programs. He is author of numerous publications relating to outdoor environmental education. He is recipient of many awards relating to outdoor education and environmental education.
He is highly qualified to author a book on the historical and philosophical foundations of outdoor environmental education. As a pioneer himself, he has lived with much of the history and the environmental education movement. This book is an excellent resource for college and university courses involving the foundations of outdoor environmental education.