Marty Essen is an American naturalist, author, photographer, and professional speaker. He has written seven books, Cool Creatures, Hot Planet: Exploring the Seven Continents, Endangered Edens: Exploring the Arctic National Wildlife Refuge, Costa Rica, the Everglades, and Puerto Rico, Time Is Irreverent, Time Is Irreverent 2: Jesus Christ, Not Again! Time Is Irreverent 3: Gone for 16 Seconds, Hits, Heathens, and Hippos: Stories from an Agent, Activist, and Adventurer, and Doctor Refurb. .