My husband is fully smitten with his sister's grown children; when these two visit, he is radiant. He does interpretive dance, makes jokes about Taylor Swift, and volunteers to watch rom-coms. He tries to lay out professional plans for these kids; he worries, in an endearing way. He proposes a slumber party--and if his invite is declined, he is undeterred. For these reasons, I had a great time with "You Only Call When You're in Trouble," a new novel about a gay man and his grown niece. The man--Tom--cares maybe too much about his "uncle" duties. He designs a guest house on his property--and he uses a blueprint that his niece (Cecily) created when she was ten years old. Tom's boyfriend, Alan, actually walks away because he is tired of playing second fiddle. And Tom daydreams about taking charge of Cecily's problems--just swapping bodies, so that he can manage certain professional storms in the place of a confused thirtysomething. Cecily is as compel...