Cool Creatures, Hot Planet: Exploring the Seven Continents follows Marty and Deb Essen on a three-and-a-half-year-long adventure to some of the wildest places on all seven continents. This is not your average travelogue. Marty Essen has written a book that entertains, informs, and poignantly reminds us that we all share a small planet. $0.99 on Kindle.