Delia Ephron is also a chronicler of her life, but one less inclined to focus on the dark side — even when the story is a tough one, as hers initially appears. A lifelong writer of screenplays, essays, novels (blessed and cursed to have followed on the heels of her sister Nora Ephron, with whom she collaborated on the quintessential ’90s romantic comedy You’ve Got Mail), Delia found the source material for her new work from the worst possible series of losses.