The Dancing Doll — Robert Wallace

DANCE OF DEATH... The tiny mechanical doll had the face of Don Winstead, youngest nephew of wealthy old Esmond Caulder, who lay on his deathbed. And the doll had a dagger in its chest! Don died, a dagger piercing his own chest, before the terrified family lawyer could summon into action the famed crime-fighter, the Phantom, to grapple with the blood-drenched plot of the evil genius who lurked behind... THE DANCING DOLL MURDERS