Roseanna is a mystery novel by Swedish writers Maj Sjöwall and Per Wahlöö, first published in 1965.
A young woman is found dead in the Göta Canal, molested and murdered.
Then a stroke of luck: through Interpol her identity is ascertained; she is Roseanna McGraw, an American tourist who was taking a boat trip in southern Sweden.
Evidence is lacking, but after the suspect is observed at length, a sting operation of questionable ethical status (Beck's own opinion) results in the suspect, a sexual deviant, attacking a female police officer and being arrested.
In 1993 a new film based on the novel and with the same name was released, this time with Gösta Ekman as Beck.