Hmm.
Reviews of that book note that she claims as fact that the 1947 "Roswell Incident" was a Soviet decoy arranged by Stalin, and that it was a craft that contained "aliens" bio-engineered by Josef Mengele?...
The objective - Of course! Obvious! - was to panic Americans in the same way as Orson Welles' "War of the Worlds" broadcast had done. Naturally, a dusty town in the wilds of New Mexico was just the place in which to achieve maximum effect.
As well as that fantasy, knowledgeable reviewers have pointed out numerous basic historical and factual errors in the book.
Caveat Emptor!
Still, no Area 51 related Internet thread would be complete without a loony flying saucer reference.