Voice of Death

One of my favorite covers of all time.  Love the rendering of the skull and the simplicity of The Shadow's silhouette, even the slight glow around the shadow.  The small eye lends a sense of eeriness to the image.  I can hear the laughter when I look at this artwork.  Yeah, I wish I owned this one.
I have yet to read this one but this review makes me think that one of the radio programs was based on this story (or vice versa).