Adventures of the Fly #27

In "The Great Z-17 Mystery!", the Fly and Fly Girl face their most baffling threat yet when Captain Greer’s true identity is unveiled as an alien scout orchestrating an imminent invasion. With the fate of Earth hanging in the balance, the duo must unravel the mystery of their own powers—mysteries even the invaders can't solve—while the stakes rise in this 1963 classic. Written by Robert Bernstein and illustrated by John Rosenberger, with lettering by John Duffy and a cover by Rosenberger, this issue delivers a clever, suspenseful twist in the series' long-running saga.