From the Introduction to the 1949 edition:
With the introduction of this travel guide in 1936, it has been our idea to give the Negro traveler information that will keep him from running into difficulties, embarrassments and to make his trips more enjoyable.
The Jewish press has long published information about places that are restricted and there are numerous publications that give the gentile whites all kinds of information. But during these long years of discrimination, before 1936 other guides have been published for the Negro, some are still published, but the majority have gone out of business for various reasons.
In 1936 the Green Book was only a local publication for Metropolitan New York, the response for copies was so great it was turned into a national issue in 1937 to cover the United States. This guide while lacking in many respects was accepted by thousands of travelers. Through the courtesy of the United States Travel Bureau of which Mr. Chas. A. R. McDowell was the collaborator on Negro Affairs, more valuable information was secured. With the two working together, this guide contained the best ideas for the Negro traveler. Year after year it grew until 1941. "PM" one of New York's great white newspapers found out about it. Wrote an article about the guide and praised it highly. At the present time the guide contains 80 pages and lists numerous business places, including whites which cater to the Negro trade.
There are thousands of first class business places that we don't know about and can't list, which would be glad to serve the traveler, but it is hard to secure listings of these places since we can't secure enough agents to send us the information. Each year before we go to press the new information is included in the new edition.
When you are traveling please mention the Green Book, in order that they might know how you found their place of business, as they can see that you are strangers. If they haven't heard about this guide, ask them to get in touch with us so that we might list their place.
If this guide has proved useful to you on your trips, let us know. If not, tell us also as we appreciate your criticisms and ideas in the improvement of this guide from which you benefit.
There will be a day sometime in the near future when this guide will not have to be published. That is when we as a race will have equal opportunities and privileges in the United States. It will be a great day for us to suspend this publication for then we can go wherever we please, and without embarrassment. But until that time comes we shall continue to publish this information for your convenience each year.