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Difference between Blue Book and Project Blue Book

Blue Book

1. a government publication providing information on some topic:

  • The U.S. Department of State issued a heavily documented 40,000-word Blue Book.

2. a directory of persons of prominence, etc.:

  • The Blue Book of British Broadcasting is a standard reference book of TV and radio stations.

3. a list of rules or requirements:

  • When the document is sent to the Panel a charge is payable according to the scales set out in the Blue Book.

Project Blue Bookthe dossier that the U.S. Air Force maintains on unidentified flying objects:

  • “Project Blue Book? Wasn’t that about UFOs?” Nick could hardly believe what he was hearing.