While there was some work from Dell-affiliated Custom Comics (which produced educational pamphlets), work with Brevity, Inc. ended when its owner unexpectedly died in 1953. There was a dispute over royalties and a failed attempt by Rosenberger and Bernstein to buy the company, but nothing came of it, leaving ACG as Rosenberger's biggest account for the mid- to late-1950s. He covered all genres for ACG, and worked in all the company's titles in some part through the mid-1960s, including "Adventures into the Unknown", "Forbidden Worlds", "Unknown Worlds", and "Romantic Adventures", all of which had managed to survive the implementation of the Comics Code Authority in 1954.