Another choppy adventure for Minnesota engineer Joe Jamison, whose hobby is checking out reported U.F.O. sightings (Only Half a Hoax). This one takes him to nearby Fox Prairie in the company of wife Karen and handsome, obnoxious researcher Cameron Rogers. Strange flashing lights, marks of landing pads, a gutted rabbit and a circle of radioactivity have been witnessed or attested to by a variety of locals--teen-age to geriatric. It doesn't take long for Joe and company to realize it's all an elaborate hoax, but things take a serious turn when Rogers is shot to death. Back home again, Joe and Karen, along with persistent reporter Jackson Powell, worry at the factors involved in the hoax and in Rogers' murder, finally honing in on the lab that Rogers headed and his obsequious technical director, John Anderson. An obvious culprit, a last-minute revelation of motive and lots of technical jargon about dissection and isotopes don't help this shambling story. Not up to the author's previous work--even for U.F.O. fans.