In 1984, Simon & Schuster with CEO Richard E. Snyder acquired educational publisher Esquire Corporation, owner of companies including Allyn & Bacon (and former owner of the magazine), for $180 million. Prentice Hall was brought into the company fold in 1985 for over $700 million and was viewed by some executives to be a catalyst for change for the company as a whole. This acquisition was followed by Silver Burdett in 1986, mapmaker Gousha in 1987 and Charles E. Simon in 1988. Part of the acquisition included educational publisher Allyn & Bacon which, according to then editor and chief Michael Korda, became the "nucleus of S&S's educational and informational business." Three California educational companies were also purchased between 1988 and 1990—Quercus, Fearon Education and Janus Book Publishers. In all, Simon & Schuster spent more than $1 billion in acquisitions between 1983 and 1991.