About
An American author of fantasy novels, he is best known for works such as Silverlock and The Moon's Fire-Eating Daughter. He also wrote several works of historical fiction.
Before Fame
He wrote for both the New York World and the San Antonio Evening News.
Trivia
He published nearly twenty books over the course of his career.
Family Life
He married Charlotte Shanahan in 1943. He and Shanahan raised two daughters.
Associated With
In his literary work, Knowles borrowed characters from Don Quixote, a famous novel by Miguel de Cervantes.