Ace Books
By the early 1970s, Ace Books became a major division of the old publisher, Charter Communications. It was in the Hippodrome Building, 1120 Avenue of the Americas, in New York City. In 1972, Grosset & Dunlap bought Ace, and in 1982, Grosset & Dunlap was bought by G.P. Putnam's Sons. Ace was likely the only profitable part of Grosset & Dunlap by this time. Ace soon became the science fiction imprint of its parent company.