DC Heroes: Lines of Death (1988) - second copy

From the back cover:

Deja Vu?
Green Arrow searches for the thread that ties together seemingly random killings...

Black Canary unravels the twisted trail of drug trafficking...

A mysterious emblem of a tangled N snags both strands of investigation. Are the Heroes' tasks separate skeins or interwoven Lines of Death?

First Match-Play Adventure!
This module is designed for tandem use by two Player Characters. In alternating encounters, Green Arrow stalks his killer while the Black Canary Player runs the adventure; Black Canary investigates undercover while the Green Arrow Player manages the NPCs.