IF YOU WANT TO GET A KID HOOKED...
Robusters, Harlem Heroes
What's "Judge Dredd"?
CASEFILE Vol 5 - Future Crime, Judge Death plus the apocalypse war.
IF YOU KNOW DREDD A BIT...
The Pit (sector house procedural), Brothers of the Blood (all the clone stories), Origins (how the judge system arose), tour of Duty (recent Dredd developments)
IF YOU DON'T CARE FOR DREDD
Brass Sun, stickleback, red seas, Defoe, shakara zombo.... too may thrills to mention.