Bloodline was made into a Paramount motion picture starring Audrey Hepburn, Ben Gazzara, James Maxin, Romy Schneider, and Omar Shariff. It was a dull movie, and its failure at the box office disappointed Sheldon and made him determined that in the future he would personally see that his books were properly filmed. Yet neither Rage of Angels nor Windmills of the Gods, both of which became movies, were noticeably better.