Dennis's day with his dad fishing on the Gilboa Reservoir turns into an amazing time-travel adventure back to the Devonian period on Earth. Dennis gets to see the living primitive trees and plants that grew at that time and the long-extinct sea creatures that can be found today as fossils in the rocks of Gilboa. Kristen VH Wyckoff is the author and illustrator of this children's adventure book. She resides in Gilboa, New York. The book is published by Black Dome Press.