Les Johnson is a physicist whose many books include Graphene: The Superstrong, Superthin, and Superversatile Material That Will Revolutionize the World; Solar Sails: A Novel Approach to Interplanetary Travel; and The Spacetime War. He serves as principal investigator for NASA's first interplanetary solar sail space missions, Near-Earth Asteroid Scout and Solar Cruiser, and lives in Madison, Alabama.
