Ian Parker’s Mapping the English Left through Film: Twenty Five Uneasy Pieces is a block-buster of a book, mercilessly unpicking the cinematic narratives that infuse twenty-five organisations. Key elements of plot and production are used to tell the story of purges and splits and cult-favourites in this innovative history of Trotskyist groups in England. This is the place where revolutionary Marxism goes to the movies. 3