Oil made the Osage Nation the wealthiest people per capita in the world.It also made them targets. In the early twentieth century, vast oil reserves beneath Osage land transformed a Native nation into an economic powerhouse. Headrights guaranteed lifelong royalty payments to Osage citizens and their heirs. But wealth without protection became a weapon used against them. Mollie Burkhart's Poisoned Legacy is a deeply researched narrative of greed, betrayal, and survival at the heart of one of the most disturbing criminal conspiracies in American history. Through the life of Mollie Burkhart, an Osage woman whose family was systematically murdered for their inheritance, this book exposes how guardianship laws, racial prejudice, and institutional corruption enabled a reign of terror that claimed dozens of lives. As local authorities failed or refused to act, killers operated in plain sight, protected by money, influence, and silence. This book explores: The rise of Osage wealth through oil and the creation of headrightsThe calculated murders of Osage citizens disguised as accidents and illnessThe role of guardianship laws in enabling financial exploitationThe emergence of one of the first major federal murder investigationsMollie Burkhart's survival, resilience, and enduring legacyWritten in clear, compelling prose, this book blends true crime with social history, centering Indigenous voices often erased from official records. It is both an investigation and a reckoning with how power and greed shaped American justice. For readers of historical true crime, Native American history, and early FBI investigations, this is a story that refuses to be forgotten.