What does Hollywood do with this book by Susanna Kaysen? The screenplay, written by the film's director, James Mangold, uses the book as its basis and dances off from there. Because Girl, Interrupted is written in a format that is not easily translatable to the screen—unlike The Snake Pit (4), for example—Mangold needed devices to communicate the themes. One device he does not use very successfully, in my opinion, is attempting to create parallels between Susanna's situation in the movie and Dorothy's in The Wizard of Oz. He employs both the book and the film version, with Judy Garland, which is seen on the ward television. Further, as Girl, Interrupted is a lean book, Mangold fleshes it out with events and relationships not in the book, and he dramatizes events by placing Susanna in them when in her written accounts she was not there.