Graphic witness : four wordless graphic novels - Walker, George A. (George Alexander), 1960-; Walker, George A. (George Alexander), 1960-; Masereel, Frans, 1889-1972; Ward, Lynd, 1905-1985; Patri, Giacomo, 1898-1978; Hyde, Laurence, 1914-1987 (Firefly Books, 2007)