THE #1 NEW YORK TIMES BESTSELLER FROM THE AUTHOR OF BIG LITTLE LIES.   One of the Best Books of the Year—Entertainment Weekly One of the Top Ten Books of the Year—People   At the heart of The Husband’s Secret is a letter that’s not meant to be read…   My darling Cecilia, If you’re reading this, then I’ve died…   Imagine your husband wrote you a letter, to be opened after his death. Imagine, too, that the letter contains his deepest, darkest secret—something with the potential