Notes: • "First printing: May 1978|First Ace printing: August 1979" • Second printing as per the number line 2 4 6 8 0 9 7 5 3 • There is another edition/printing which also has a number line with the lowest number a '2' but it's at the end of the line • That edition's cover is also different with the dolphin and two figures 'raised' and in shiny grey • About 50 interior illustrations by James R. Odbert credited on the title page