Notes: First published in Great Britain by Sphere Books 1973. Reprinted 1977. This is one of two known versions whose copyright page has "Reprinted 1977". It differs from the first one in only that the additional prices listed on the back cover (see below) are higher. "A somewhat different version of this book was published in America in 1954" on the title page. Cover artist not credited but signature "Woodroffe 1973" is clearly visible in the bottom left quarter, next to runic inscription. Other prices: A$2.95; NZ$2.95; Eire 93½p; Malta 85c. The UK price is not readable on the cover; price from the other copy used. Based on the other prices, it is possible that the correct price is £0.85 but an undamaged copy will need to be found to confirm the price.