The Mystery of Lost River Canyon

Fosdick, known as Harry Castlemon, was a significant figure in juvenile literature, particularly for boys, during the golden age of children's literature. His experiences in the Union Navy during the Civil War deeply influenced his writing, leading to popular works like Frank on a Gunboat and Frank on the Lower Mississippi. Born in New York and a high school graduate, he began writing as a teenager and became the most-read author for boys in the post-war period, leaving a lasting impact on juvenile storytelling.