The American Gun Mystery Author:Ellery Queen 20,000 WITNESSES TO MURDER! — Buck Horne was shot down in front of 20,000 fans awaiting his comeback in the world's largest rodeo. — Ellery Queen was in the audience. But after a month of investigation the brilliant detective was as baffled as everyone else. — There was no motive and no murder weapon. So the rodeo reopened with the death unsolved... more » ... and then another man died in precisely the same matter as Buck Horne ... and again there was no motive or murder weapon!