The President Of Steel! A ray from an alien computer triggered by an enemy agent gives Superman amnesia. He cannot remember his secret identity, and ends up masquerading as the president of the United States for a week while the real president is on a secret mission
The Supergirl Best-Seller! During an incident in which Supergirl transported the Stanhope University library into the future to protect it from a super-villain, a student from the future mistakenly took a biography of Supergirl from his time to the library and left it there. After Supergirl takes the Stanhope library back to the 20th Century, librarian Hilda Powell acquires the Supergirl biography and uses it as the basis of a best-selling book which reveals much of Supergirl's personal life and foretells accurately her future deeds. Supergirl takes Powell to court, but the court rules that, as a public figure, she has no right to stop Powell from writing an unauthorized biography. But, by performing a super-feat in a different manner from the book's recounting of it, she shifts them into a different time-line. The book's pages turn blank, Hilda Powell's memories of it fade, and even Supergirl cannot remember what she has read of her future life. Presumably, all the other copies of the book turn blank, and the people of Earth forget what they have learned of Supergirl's future.
