Stone Arabia, Dana Spiotta’s moving and intrepid third novel, is about family, obsession, memory, and the urge to create — in isolation, at the margins of our winner-take-all culture. In the sibling relationship, “there are no first impressions, no seductions, no getting to know each other,” says Denise Kranis. For her and her brother, Nik, now in their forties, no relationship is more signific...