Aware her "Book of Jack London" was neither comprehensive nor unbiased, Charmian searched for an experienced biographer to prepare a comprehensive study. This led in 1935 to her inviting Irving Stone to the ranch to study the extensive collection of letters and documents needed for the work. Discovering he went into some of her hidden diaries and love letters, Charmian evicted him from the ranch. His "Sailor on Horseback" earned reviewer criticism for lifting material from London's fiction as fact, emphasis upon excessive womanizing, and failures as a writer and rancher. Charmian and Eliza Shepard were shocked to read the claim Jack had committed suicide. The publishers brought out the second edition with the subtitle "A Biographical Novel." In response to Stone's version, Charmian supported stepdaughter Joan London. Her "Jack London and His Times" emphasized her father's Socialist writings and activities. As a further block on Stone's book, Charmian arranged screenplay rights of her biography. "Jack London" featured in 1943, starring Michael O'Shea as Jack and Susan Hayward as Charmian.