 Although the book is classified as fiction, Brucker claims it does not alter any known historical facts.In addition to spending more than 50 years exploring Mammoth Cave, Brucker worked as an advertising executive and was, at various times, an adjunct professor of marketing at Wright State University in Dayton.He is a co-founder of, and is active with, Karst Environmental Education and Protection, a non-profit organization dedicated to the preservation of land containing sinkholes and caves.