The Genesis Cloud . . . not being alone is only half the story. And there are reasons for the silence. Only one file in the United States government bears the designation SENTKO, an acronym for special executive need to know only. SENTKO is a security classification created specifically to hide Galaxy, the government's most closely guarded secret. For more than half a century the information contained in the special file has been secure. But now the SENTKO-shrouded secret has been divulged to a doctor by one of his patients, the last living member of an unofficial committee created in 1947 by President Harry S. Truman to deal with the Roswell incident and the as yet unnamed Galaxy. The doctor has also been told something else by his patient. There is a second secret that the government does not know, a secret so incredible and frightening that it almost defies imagination. And unknown to the doctor, his knowledge of both secrets has marked him for assassination.