[3] Penguin's success inspired entrepreneur Robert F. de Graff, who partnered with publishers Simon & Schuster to bring it to the American market.

Robert de Graff continued to refine his selections with movie tie-ins and greater emphasis on mystery novels, particularly those of Christie and Erle Stanley Gardner.

Following Field's death in 1957, Leon Shimkin, a Simon & Schuster partner, and James M. Jacobson bought Pocket Books for $5 million.

[6] In 1981, Dr. Benjamin Spock's Baby and Child Care was listed as their top seller, having sold 28 million copies at that time and having been acquired in 1946.

Pocket was for many years known for publishing works of popular fiction based on movies or TV series, such as the Star Trek franchise (owned by former corporate siblings CBS Television Studios and Paramount Pictures).