This is the 9625th most frequent Polish word.
wyszyńskiego
"Wyszyńskiego" is a possessive or locative form of "Wyszyński," a Polish surname, often referring to something related to or named after a person with that name.
In this sentence, 'Wyszyńskiego' is in the genitive case and refers to the author of the book, Cardinal Wyszyński.
Czytałem książkę autorstwa Kardynała Wyszyńskiego.
I read a book written by Cardinal Wyszyński.
Here, 'Wyszyńskiego' is in the genitive case used with the preposition 'o' to discuss the impact of Cardinal Wyszyński.
Rozmawialiśmy o wpływie Wyszyńskiego na społeczeństwo.
We talked about the influence of Wyszyński on society.
Here, 'Wyszyńskiego' is used locatively to indicate the name of the street, likely named after a person with the surname Wyszyński.