British Editions

• Penguin 1970, 221 pages, paperback
• Panther 1978, 207 pages, 95p, paperback
• Panther 1984, 207 pages, paperback
• Triad Grafton 1987, 240 pages, £2.50, paperback
• Grafton 1992, 224 pages, £4.99, paperback
• Voyager 1998, trade paperback
• Gollancz 2005, 208 pages, £6.99, trade paperback