What novel has been the longest on the NY Times best seller list?

Answer 1

Well, it's not really a novel, but . . .

And Did You Know...
• The book that enjoyed the longest run on the New York

so, my next guess would be

The Valley of the Dolls by Jacqueline Susann
This tale of sex, violence, and drugs by Jacqueline Susann (1921-74), first published in 1966, is perhaps surprisingly the world's bestselling novel.
Margaret Mitchell's Gone With the Wind, which has achieved sales approaching 28,000,000, is its closest rival."

Answer 2

The Da Vinci Code by Dan Brown

Answer 3

the bridges of Madison County by robert james waller