"From the author compared to Norah Ephron and Nancy Mitford, not to mention Jane Austen, comes a new novel celebrating the beauty, mischief, and occasional treachery of language. The Grammarians are Laurel and Daphne Wolfe, identical, inseparable redheaded twins who share an obsession with words. They speak a secret "twin" tongue of their own as toddlers; as adults making their way in 1980s Manhattan, their verbal infatuation continues, but this love,...