Doc Savage Fortress of Solitude
Conde Nast
New Yorker May 25th, 1963
Saul Steinberg
Doc Savage The Mystery on the Snow
Conde Nast
New Yorker December 4th, 1971
Saul Steinberg
Doc Savage The Time Terror
Conde Nast
New Yorker March 7th, 1970
Saul Steinberg
New Yorker October 21st, 1972
Saul Steinberg
Doc Savage Rock Sinister
Conde Nast