Doon Harrow is a fictional character from the book series titled "The Last Kids on Earth," created by Max Brallier. He is known for his intelligence and resourcefulness, often using his knowledge to help his friends navigate challenges in a post-apocalyptic world filled with monsters and zombies. In the series, Doon is characterized by his loyalty and bravery. He is part of a group of kids who band together to survive and have adventures in their new reality. His skills in strategy and problem-solving make him a valuable member of the team as they face various threats.