From the bestselling authors of the girlfriends series comes a tribute to relationships that stand the test of time. Two-color with bound-in ribbon bookmark.

"This is the smart summer thriller you've been waiting for."--NPR's All Things Considered NAMED A MUST READ BY THE BOSTON GLOBE, BBC.COM, AND NEW YORK POST NAME

Marriage should be based on love, right? But does it seem as though you and your spouse are speaking two different languages? #1 New York Times bestselling auth

NEW YORK TIMES BESTSELLER NAMED ONE OF THE BEST NOVELS OF THE YEAR BY Slate • Daily Candy • St. Louis Post-Dispatch • The Guardian (U.K.) “Novelists get