Harry was kind of important in the 20s. He was involved in films. Some of the films he was involved in was The Master Mystery and The Grim Game. In 1921, he started the Houdini Picture Company. One film his company produced was The Man From Beyond. Houdini was also an author. A couple of his books were named Miracle Mongers and Their Methods (published in 1920), and A Magician Among the Spirits (published in 1924).