THE REPORT ON UNIDENTIFIED FLYING OBJECTS               by Edward J. Ruppelt                                                                    Ace Books, Vintage Reprint, 1963                                              Condition: About Very Good                                                                                                                                                                 Written by a former head of the U.S. Air Force Project Blue Book, this is one of the key books on the subject of UFOs.  318 pages.  Some flaking at top of back cover, modest wear on the extremities & spine edges, spine wrinkle, some marks on lower page edges, light page toning with some darkening on margins (and cover backs are quite brown); but binding is tight and interior has no writing or markings.