Until Shadows Fall — Will Cook

It is 1874. Now that peace has been established between the United States Army and the Comanche nation, citizens who lost children to Comanche raids over the years are pressuring Congress for their return. The War Department has delegated the task to Colonel Frazer at Fort Elliott in Texas, who dispatches a team to negotiate for the release of all white prisoners. But the mission is preposterous at best. The captives have lived as Comanches for so long that they have no desire to rejoin the white culture.