DAY OF THE GIANTS by Lester Del Rey 1964 Airmont FIRST PRINTING PB

Police Your Planet by Lester del Rey & Erik van Lhin 1975 PB Ballantine SF

Nerves by Lester Del Rey

Day of The Giants 1964 & Nerves 1974 by Lester Del Rey---PB acceptable

THE MYSTERIOUS PLANET by Lester Del Rey, Ballantine 1978 PB

Police Your Planet by Lester Del Rey Ballantine PB 1975 Steranko Cover

THE MYSTERIOUS PLANET by Lester Del Rey (Del Rey PB Printing 1978) Sci-Fi

Fiction PB: ROBOTS AND CHANGELINGS by Lester del Rey. 1958. Ballantine 246