The New York Times previews a play and a forthcoming children's book about a nearly forgotten travel guide that helped African Americans (and African Canadians) navigate the segregated accommodations that prevailed into the 1960s. A Harlem postal employee and civic leader named Victor H. Green conceived the guide in response to one too many accounts of humiliation or violence where discrimination continued to hold strong. These were facts of life not only in the Jim Crow South, but in all parts of the country, where black travelers never knew where they would be welcome...