 Walpole 's books cover a wide range . His fiction includes short stories , <unk> ( Mr Perrin and Mr Traill , 1911 , and the Jeremy trilogy ) that <unk> into the psychology of <unk> ; gothic horror novels ( Portrait of a Man with Red Hair , 1925 , and The Killer and The <unk> , 1942 ) ; a period family saga ( the Herries chronicle ) and even detective fiction ( Behind the Screen ) . He wrote literary biographies ( Conrad , 1916 ; James Branch <unk> , 1920 ; and Trollope , 1928 ) ; plays ; and screenplays including David Copperfield , 1935 . 
