Gerard Colby (Zilg), had written a book on the DuPont family named "Du Pont: Behind the Nylon Curtain", which was nominated for a National Book Award in 1974. When the first edition came out, the DuPonts played hardball with publisher Prentice-Hall and anyone who dared review the book favorably. Prentice-Hall caved in and slashed its print run and advertising, despite high demand. Ultimately P-H let it go out of print altogether. In 1984 Lyle Stuart re-released an extended version named "Du Pont Dynasty: Behind the Nylon Curtain" that seems also to be under boycott (counting results of a google search).