Orig. title : The Mighty Blockhead. A Belmont Johnny Fletcher Mystery 50293 "When Johnny Fletcher found a corpse in his trunk, he was sure he could solve the case. Then one murder turned into two, the beautiful blonde lied to him, and the real secret turned out to be somewhere in Iowa."
Used availability for Frank Gruber's The Corpse Moved Upstairs
August 1992 : UK Paperback
January 1972 : USA Mass Market Paperback