In this new volume of letters, readers are invited to meet Olivia Louise Langdon Clemens on her own terms, in her own voice—as complementary partner to her world-famous spouse, Mark Twain, and as enduring friend, mother to four children, world traveler, and much more. The frail woman often portrayed by scholars, biographers, and Twain himself is largely absent in these letters. Instead, Olivia (who Twain affectionately referred to as "Gravity" in their early correspondence) emerges as a resilient and energetic nineteenth-century woman, her family's source and center of stability, and a well of private and public grace in an ever-changing landscape. Mark Twain's biography recounted in Olivia's letters offers new insights, and her captivating voice is certain to engage and enlighten readers.