Michael S. Allen's book The Ocean of Inquiry: Niscaldas and the Premodern Origins of Modern Hinduism (Oxford UP, 2022) focuses on a single remarkable work and its place within that history: "The Ocean of Inquiry," a vernacular compendium of Advaita Vedåanta by the North Indian monk Niâscaldåas (ca. 1791 - 1863). Though not well known today, …