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.
"Evelyn has been married to her husband for forty years-forty years since he slipped off her first wedding ring and put his own in its place. Delphine has seen both sides of love-the ecstatic, glorious highs of seduction, and the bitter, spiteful fury that descends when it's over. James, a paramedic who works the night shift, knows his wife's family thinks she could have done better; while Kate, partnered with Dan for a decade, has seen every kind of wedding-beach weddings, backyard weddings, castle weddings-and has vowed never, ever, to have one of her own.
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.