ppint. 10th Mar 2020
| | ace books mmpb first printing, first edition
half a classic "ace double" format mmpb with two front covers, contents tête-beché to each other
cover art by ed emshwiller (signed "emsh", uncredited)
cover price 35¢
256pp. including 2 x titles, indicia etc, advertising pp. in-between the double's halves |