In a further exploration of the Mega-Books writers’ guidelines from the early 1990s, some of the topics which were off limits in the Syndicate era were allowed (murder) while some topics used in early books (drugs or alcohol) were prohibited.
A guide to writers of Nancy Drew books for Mega-Books provides details on the scope of the modern series. The procedures were different from those used by the Stratemeyer Syndicate.
As sales declined in the 1970s, Harriet Stratemeyer Adams considered whether to accept an overture from Simon & Schuster to publish new books in the series. First Grosset & Dunlap failed to do anything for the Bobbsey Twins 75th anniversary. Then they admitted they had no plans for Nancy Drew’s 50th in 1980. Simon & Schuster stepped in and hosted a gala event.
With all of its secrets, more is known about the Stratemeyer Syndicate than is known about the book packager that followed them, Mega-Books, after Simon & Schuster bought the Syndicate.