Charles Alexander Eastman, born on February 19, 1858, and known originally as Hakadah, later named Ohíye S'a, was a Native American physician, writer, national lecturer, and reformer of Santee Dakota and Anglo-American ancestry. Eastman's literary legacy thrives through the detailed depiction of Native American life and culture in works such as 'Indian Child Life', wherein he elucidates the customs and education of Indigenous North American children with precision and sensitivity. An author whose oeuvre primarily focused on his Native American heritage, Eastman was a cross-cultural figure, straddling the diverse worlds of native traditions and Western education. Through his books, Eastman sought to address the misconceptions and foster understanding between Native Americans and the Euro-American society. His literary style intertwines storytelling with ethnographic detail, an approach that renders his narration not only authentic but also educational. A significant figure in the pantheon of Native American literature, Eastman's contributions extend beyond his writing; his efforts in healthcare and as a Native American rights activist are well documented. Eastman's autobiographical works, including 'Indian Boyhood' and 'The Soul of the Indian,' along with 'Indian Child Life,' serve as enduring testaments to his legacy, bridging cultural divides and preserving the history and social practices of the Sioux people for posterity.