Doc Savage Double Novel Volume 54

"Doc Savage and his beautiful cousin Patricia battle threats to national security in pulp classics by Evelyn Coulson and Lester Dent writing as 'Kenneth Robeson.' First, while testing an experimental plane for the Army, Renny disappears when his aircraft is engulfed by 'The Yellow Cloud!' Then, what has transformed Monk, Ham and Johnny into cowardly 'Men of Fear'? The incredible secret could end the war, unless Nazi agents seize it first! This special collector's edition showcases the original color pulp covers by Emery Clarke, Paul Orban's classic interior illustrations and historical commentary by Will Murray, author of eight Doc Savage novels."