Cover: Curt Swan & Stan Kaye

Action Comics #240

May 1958 · DC · 0.10 USD

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“Secret of the Superman Sphinx”

In "Secret of the Superman Sphinx," Bill and Janu team up with Professor Wakely to recover a crucial component for his enlarging ray, now lost in the tall grass. With Bill volunteering to shrink to just an inch tall, the world around him transforms into a perilous landscape where ordinary insects loom as towering threats. Written by Jack Miller and illustrated by Howard Sherman, with Curt Swan and Stan Kaye handling the cover, this 1958 adventure blends science and suspense in a clever, scaled-down showdown.

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writer Jack Miller · artist, inker Howard Sherman · cover Curt Swan, Stan Kaye

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FR $33 GOOD $39.99 GD $60 GD $86 GD $96 VG $107.99 VG $145 VG+ $180

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Full credits

writer Jack Miller

artist, inker Howard Sherman

cover pencils Curt Swan

cover inks Stan Kaye

Full plot ⚠ may contain spoilers

▸ Reveal full plot — may contain spoilers

Bill and Janu aid Professor Wakely in finding a small element needed to power his enlarging ray, which has fallen among the long grass. By volunteering to be shrunk to an inch tall, everyday insects now appear like threatening monsters.

Plot details indexed by the Grand Comics Database (CC BY-SA).