His family moved several times, and after his parents died, he ended up living with a sister. Eventually, his artwork came to the attention of a college professor, and he had his own shown in Portland. His artwork started to sell, and continued to grow in popularity after his death in 1977.
In this book, Say tries to explain Castle's eccentricities by fleshing out the outline of his life, and uses homages to some of Castle's own illustrations to try to understand what motivated and inspired this somewhat obscure folk artist.
Fans of Say's work, such as The Sign Painter and Drawing from Memory will find this portrait of a fellow artist to be an interesting addition to Say's portfolio.