SF novel, First published as an Ace paperback original in 1970: the first UK edition was the 1976 Panther first paperback printing (there was a second printing later the same year) - this is the third Panther printing from 1984 with the same Jim Burns cover art as found on the 1976 printings. ''Published by Panther Books 1976/Reprinted 1984'' on the copyright page. Not listed in Levack: PKD: A Philip K. Dick Bibliography: Revised Edition (1988), even though in the introduction (in fact the very first sentence) it states ''This bibliography attempts to cite all the published works of Philip K. Dick through late 1984''.