Originally published in three separate vols. : Spacejack, 1978 -- Roboworld, 1979 -- Terrorsaur!, 1981. London : W.H. Allen.
Spacejack
Roboworld
Terrorsaur!
Star quest by Terrance Dicks. ISBN 1844350665. Published by Big Finish Productions in 2003. Publication and catalogue information, links to buy online and reader comments.