The Negro Travelers' Green Book (1956)
I learned of it by watching my parents use it while growing up in the Jim Crow south.<p>You people were never supposed to know of it.  You could not be trusted not to burn the businesses to the ground.<p><pre><code>  Are any reader surprised to learn that such is still very much needed and that several things things may well still exist and be in use to this day?
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Same as it ever was.  Thats why those of us who live through it still teach our children and grandchildren to &quot;Never Trust Whitey&quot;.  Funny how White folk are offended by that concept.