Book 4 in the SF/F series Children of The Dragon by T. M. Moore.
The year is 1984. Michael Burton is a reporter who becomes part of the story when he covers the war between the dragon tongs in Chinatown San Francisco. He falls for a beautiful Chinese cop who tries her best to protect him, and forms an unlikely alliance with the Red Dragons. But when his grandmother is murdered, Michael meets with a fullblood who kills for a living to find out why. The answers only serve to deepen the mystery. Michael is captured by the leader of the Black Dragons, Xuan Longyan, and is forced to fight to save the woman he loves.
"Change is the only constant in the universe."