The Shadow Hero (Turtleback School & Library Binding Edition) by Gene Yang

The Shadow Hero is based on golden-age comic series The Green Turtle, whose hero solved crimes and fought injustice just like any other comics hero. But this mysterious masked crusader was hiding more than your run-of-the-mill secret identity...The Green Turtle was the first Asian American superhero.Now, exactly seventy years later, author Gene Luen Yang has revived this nearly forgotten, pioneering character in a new graphic novel that creates an origin story for the golden-age Green Turtle.