A federal jury awarded John Steinbeck’s stepdaughter more than $13 million in a lawsuit claiming the author’s son and daughter-in-law impeded film adaptations of his classic works.

Jurors in Los Angeles found Tuesday in favor of Waverly Scott Kaffaga, who alleged that long-running litigation over Steinbeck’s estate prevented her from making the most of his copyrights at a time when marquee names such as Steven Spielberg and Jennifer Lawrence were interested in bringing the novelist’s masterpieces back to the screen.