He has written seventeen books, including Route 66: The Mother Road, about the historic highway United States. Route 66. His work has also been published extensively in magazines and newspapers, including Time, Life, People, Smithsonian, The New Yorker, and The New York Times. He has been inducted into the Oklahoma Writers Hall of Fame, Writers Hall of Fame of America, and the Oklahoma Historians Hall of Fame, and was the first inductee into the Oklahoma Route 66 Hall of Fame.
Wallis was interviewed by Republican
Roy Blunt (R-Missouri) for After Words on Book television, 29 April 2007, discussing his latest book, Wallis graduated from Western Military Academy in Alton, Illinois in 1963. He later attended the University of Missouri in Columbia, and moved to Miami, Florida, in 1978, where he worked for Time"s Caribbean Bureau.
Wallis also provided the voice of Sheriff in the Disney·Pixar Cars series as well as in the Cars Toons: Mater"s Tall Tales episode "Tokyo Mater".