Sonya garnered a reputation for being able to adapt all kinds of material into a film screenplay, although she was not known for her prowess at dialogue. For Fox, she penned a detective thriller Behind that Curtain, featuring Charlie Chan. She worked at length with Frank Borzage on Lucky Star, only to have it be labelled Frank Borzage's Lucky Star. Sonya helped not only Borzage, but also Will Rogers, transition to sound films. She also collaborated with S.N. Behrman in three of the next six projects she would assist on.
