Zemen, Z. Selling the War: Art and Propaganda in World War II London: Orbis, 1978 

A general work, with a substantial section upon British propaganda. Very heavily illustrated, in fact the images almost overpower the text, but the text is quite 'learned' and includes many important details, such as the significance of some of the images contained in the posters, including flags. Posters are compared with other types of propaganda, not simply left to stand alone.