The Man Who Killed Himself is a 1967 comedy crime novel by the British writer Julian Symons.[1]
Sick of his life with his wealthy but domineering wife, Arthur Brownjohn creates a flamboyant alter ego for himself and enjoys life with his second identity. Pushed too far one day he decides to murder his wife in the disguise of his other persona.
In 1969 it was adapted into the film Arthur? Arthur! directed by Samuel Gallu and starring Shelley Winters, Donald Pleasence and Terry-Thomas.