Book excerpt: The Golden Age of Superman tales are collected for the first time in their entirety in this oversize omnibus series, continuing with stories from the early 1950s in Superman: The Golden Age Omnibus Vol. 7. As the 1950s began, the Man of Tomorrow was faced with new dangers big and small! In these stories that are reprinted here for the first time, Lex Luthor invents a device that banishes Superman to the fourth dimension, while Mr. Mxyztplk makes the entire city of Metropolis forget that their hero ever existed. Plus, Superman becomes a super-cowboy and meets a mighty caveman who was frozen in an iceberg. This new hardcover collects the Metropolis Wonder's tales from Action Comics #125-143, Superman #55-65, and World's Finest Comics #37-47.