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?
(..) Dialogue: Marked=..,Default,NTP,!Effect,One of a wizard's most rudimentary\Nskills is levitation... Dialogue: Marked=..,Default,NTP,!Effect,...or the ability to make objects fly. Dialogue: Marked=..,Default,NTP,!Effect,Do you have your feathers? Good. (..)2001 Harry Potter and the Sorcerer's Stone