Items with "Roper, Robert (Bob)" as Credited Illustrator
The Badlands of Hark (1 edition)Calling Outer Space (3 editions)
The Invaders of Hark (1 edition)
Journey to Vernico 5 (3 editions)
The Skeleton Returns (1 edition)
You Be the Jury: Courtroom III (3 editions)
You Be the Jury: Courtroom IV (3 editions)