The Karen Apostle: or, Memoir of Ko Thah-byu is a missionary biography that recounts the life, conversion, and evangelical labors of Ko Thah-byu, a Karen man in nineteenth-century Burma who became an influential Baptist Christian witness among his people. Written in the earnest, providential style of Protestant mission literature, the work combines spiritual narrative, ethnographic observation, and denominational history. Its literary context is the expanding corpus of Anglo-American missionary memoirs, where individual conversion becomes a lens through which to interpret cultural encounter, religious transformation, and imperial-era evangelization. Francis Mason, an American Baptist missionary, spent many years in Burma and became deeply engaged with Karen language, culture, and Christian communities. His linguistic and pastoral work gave him close access to the world he describes, while his theological commitments shaped his interpretation of Ko Thah-byu's life as evidence of divine agency. Mason's memoir reflects both intimate knowledge and the assumptions of his missionary age. This book is recommended to readers interested in Christian mission history, Southeast Asian religious change, colonial-era biography, and Karen studies. It remains a significant, if historically situated, testimony to indigenous agency within global Protestant expansion. This enriched edition has been carefully crafted to add value to your reading experience. - Hand-picked Memorable Quotes shine a spotlight on moments of literary brilliance. - Interactive footnotes clarify unusual references, historical allusions, and archaic phrases for an effortless, more informed read.