severance_23's photos with the keyword: venturer twelve

First published in the U.S. by Ballantine in 1972. This U.K. edition published by Pan (ISBN: 0330240994) is dated 1974. Cover art by Dean Ellis - also used for the Ballantine edition of Arthur C. Clarke's "Expedition to Earth" (though the number on the ship was changed).

First published in the U.K. by MacDonald (hardback) in 1968. This paperback edition published by Pan (ISBN: 0330240986) in 1974. My copy was well-read when I bought it, and has been even more well-read since - the first book in a much-neglected series.