Prior to the civil rights movement and the passage of the Civil Rights Act, there were many places around the United States that were extremely dangerous for African-Americans.
To help travelers of color make safe choices, there was the annually-published "Negro Motorist Green Book." It let African-Americans on the road know which restaurants they could eat in and which hotels they would be permitted to stay in.
In the spirit of that book — but with a very modern twist — comes the "Post-Racial Negro Green Book," written by Jan Miles.