The novel, which will be published by Knopf in June, follows an engagement ring from the 1930s to present day, which connects five separate couples in unexpected ways. Here's the official description of the plot from author J. Courtney Sullivan's official website.
As these lives and marriages unfold in surprising ways, we meet Frances Gerety, a young advertising copywriter in 1947. Frances is working on the De Beers campaign and she needs a signature line, so, one night before bed, she scribbles a phrase on a scrap of paper: "A Diamond Is Forever." And that line changes everything."
Reese Witherspoon will produce through her Pacific Standard company alongside Bruna Papandrea. The actress may also be a part of the ensemble cast, although it is not known what role she may portray. No production schedule was released.