ACTION COMICS #353 - DC COMICS - JUN 1967 (4.0)

Zha-Vam blocks Superman from returning to Earth by using the mythical Shield of Orion. Superman travels into the past to visit the gods of Olympus to learn the origin of Zha-Vam and the means with which to defeat him.; Supergirl is captured and taken to the planet Zorkia by the Living Library, a collection of disembodied brains that travel the universe to collect information. They implant Supergirl with all their knowledge, intending that she serve as their permanent replacement on Zorkia so that they are free to contunue their travels.