Second print of this Golllancz edition.
138 numbered pages, 160 total.
Cover detail by Geoff Taylor from the 1986 Grafton edition.
Reprint of the 1969 edition with minor textual amendments which itself was an expanded version of the novella first printed in New Worlds SF magazine Vol 50 #166, September 1966.
Introductions by John Clute and Michael Moorcock.