Francois Chastanet is an architect, graphic and type designer interested in written signs in public space, from wayfinding typography to ephemeral handwritings. As a documentary author, he writes on urban epigraphy and the evolution of the Latin letter in the 20th and 21st centuries. Other books by Chastanet include Pixacao: Sao Paulo Signature (2007) and Dishu: Ground Calligraphy in China (2013). Born in 1944 in Wilmington, North Carolina, Howard Gribble grew up in Southern California in the 1950s and 1960s, where he immersed himself in gang and lowrider culture associated particularly with youth from the barrios of the Mexican / American community. In the early 1970s he photographed Latino gang graffiti, throughout a wide geographic area in order to encompass a larger variety of styles and variations. In 2007, Gribble showed the photos for the first time on the photo sharing site Flickr. The collection proved to be unique, and the interest was enormous. Born 1949, Chaz Bojorquez is a resident of Highland Park East LA. Growing up, he was exposed to the values and craft of graffiti in the territory of "The Avenues" gang. He began his career by spraying alongside the river banks of the Arroyo Seco and is acknowledged as a pioneer of LA Cholo style graffiti. Bojorquez is represented in numerous museum collections, including The Smithsonian Institute: National Museum of American Art, National Museum of American History, National Museum of American Archives. 2020 he was awarded an Honorary Doctorate Degree from Art Center School of Design, Pasadena.