Joe Grey is the titular protagonist of a series of novels by Shirley Rousseau Murphy, starting with Cat on the Edge (1996). Joe Grey was an ordinary tomcat. He spent his days hunting mice, fighting for alley scraps, and being the top cat in his home, favored by his owner, Clyde. Later on, the two of them make it a habit to solve local crimes, and, joined by a young cat named Kit, they become regular anonymous snitches... as long as they can keep their secret abilities hidden.