a writer's 'ability' [='capability', 'capacity'] 'to interest' readers
He always works 'to the best of his ability'. [=as well as he can]
Does he have the 'ability' [='authority'] 'to fire' employees?
(..) Sokovia's had a rough history. It's nowhere special but it's on the way to everywhere special. - Their abilities? - He's got increased metabolism and improved thermal homeostasis. Her thing is neural electric interfacing, telekinesis, mental manipulation. He's fast and she's weird. (..)2015 Avengers: Age of Ultron