In this existential murder mystery, it is Christmas Eve, and fifty-five-year-old professor Pål Andersen is alone, drinking coffee and cognac in his living room. Lost in thought, he looks out the window and sees a man strangle a woman in the apartment across the street. Failing to report the crime, he becomes paralyzed by his indecision. Professor Andersen’s Night is an unsettling yet highly entertaining novel, written in Dag Solstad’s signature concise, dark, and witty prose.…