The Negro Motorist Green Book, 1950.

First published in 1937 by Victor H. Green & Company, The Negro Motorist Green Book provided African American travelers with a national guidebook for navigating segregated facilities on US highways, including hotels, restaurants, and gas stations. The Green Book (later renamed The Negro Travelers’ Green Book) became an essential reference for African Americans to travel more safely and comfortably during the Jim Crow era, when black travelers were regularly denied services, treated with hostility, and threatened with physical harm simply for seeking accommodations, food, or gas from white providers. The guidebook included recommendations and warnings for every state, highlighting the fact that racism made travel dangerous across the country, not just in the segregated south. This edition of the Green Book would have been one that readers of Invisible Man in 1952 might have referred to for their own travels. The last guidebook was published in 1966.