Max Pulver is the author of four graphology books (1931, 1934, 1944 and 1949), several articles, and one novel (1927). He developed the theory of symbolism of space. His work discusses pressure, intelligence, and crime. He founded the Schweizerische Graphologische Gesellschaft (Swiss Graphological Society) in 1950 and was president until his death. Source: Wikipedia (en)