The author certainly did his research: 7 pages of footnotes. A very sad story of a girl from Marshalltown, Iowa who made it big in the movies, though she was more popular in France than in the U.S.
The author told her life story in an unbiased way, stating facts as he found them. Jean was caring and wanted to help people, but was badly used by many. Again, he stated the facts of her three marriages but didn't try to figure out why she made the choices she did. Addiction and mental illness can only be described, not explained. But adding Hoover's FBI to her story made it truly over the top. (The FBI spread an untrue rumor about the father of the daughter she carried who died at birth that made the headlines.)