“Excuse me. Do you know where the library is?” “I'm sorry. I'm a 'stranger' here myself.”
She is 'no stranger to' controversy. [=she has been involved in controversy before]
He is a 'stranger to' losing. [=he does not know what losing is like]
(..) calls me up, tells me to go and arrest Lady Litton immediately, without a charge. I call him back, I find he's not in his office. Even stranger, I find he's gone away on vacation. Cato, things are very fishy in Denmark. Switzerland. Yes, there too. (..)1975 The Return of the Pink Panther