Theodore Boone is back - and the stakes are higher than ever. When his best friend, April, disappears from her bedroom in the middle of the night, no-one has the answers. As fear ripples through his small hometown and the police hit dead ends, it's up to Theo to chase down the truth and save April.

In the 1920s, the richest people per capita in the world were members of the Osage Indian nation in Oklahoma. After oil was discovered beneath their land, they rode in chauffeured automobiles, built mansions, and sent their children to study in Europe. Then, one by one, the Osage began to be killed off. The family of an Osage woman, Mollie Burkhart, became a prime target. Her relatives were shot and poisoned. And it was just the beginning, as more...