Read The Eleventh Hour Storyline:
Arthur Conway had committed murder — a perfect murder. Even the cops assured him that the evidence clearly proved he could not have done it. An abridged version of this novel has appeared in The American Magazine Oct 1950 under the title “Design for Death” and printed in Ellery Queen’s Mystery Magazine [v59 #5, #342, May 1972] under the title “All According to Plan”.Pages of The Eleventh Hour :
