Annie Heloise Abel's The American Indian Under Reconstruction is a rigorous historical study of federal policy toward Native nations in the aftermath of the American Civil War, especially in Indian Territory. Written in a documentary, analytical style characteristic of early twentieth-century institutional history, the book traces treaties, land settlements, emancipation questions, and the reorganization of tribal governments. It belongs to Abel's larger scholarly project on Indigenous peoples and the Civil War era, illuminating Reconstruction beyond its usual North-South frame. Abel was a pioneering professional historian whose archival discipline and attention to government records shaped her interpretation of Native American history. Trained in an era when few women held authority in the historical profession, she brought unusual persistence to neglected sources concerning the Five Tribes, federal agents, military officials, and congressional policy. Her work reflects both the strengths and limitations of her time, yet remains foundational for understanding Native experiences in national crisis. This book is recommended to readers interested in Reconstruction, Indigenous sovereignty, treaty history, and the expansion of federal power. Though demanding in its detail, it rewards careful reading by revealing how Native nations were forced to negotiate freedom, loyalty, land, and survival within a transformed United States.