Notes: First published in Great Britain 1966 as part of "A Heinlein Triad", including "The Puppet Masters". First Pan Edition 1969. This is second printing, 1975. Other prices: Australia $1.25, NZ $1.20 Cover and spine omit the "A." from author name, and use a "+" rather than an "and". Title page has the initial and the 'and'. Cover art credit from Mythopoeikon, no credit or signature in/on the book