Pulp (1972)

Michael Caine is pulp fiction writer Mickey King, who finds life mirroring his art when he is asked to ghost-write the memoirs of a mystery celebrity. King is taken to meet his subject on a remote island by attractive Liz Adams (Nadia Cassini), once there he meets Preston Gilbert. Gilbert is an obnoxious and abusive over-the-hill film star with a speciality for playing gangsters, and suspected of having Mafia connections. Gilbert encourages King to take down notes of his colourful life and invites him to attend a party later in the day; while at the party, gunshots ring out and Gilbert is found dead. King now decides on amateur detective work to seek the reasons for the actors murder and at the same time put his own life in jeopardy.