Dennis McAuliffe (1994), The Deaths of Sybil Bolton: An American History, Times Books; republished as (1994), Bloodland: A Family Story of Oil, Greed and Murder on the Osage Reservation, Council Oak Books The reservation, of 1470000 acres , is coterminous with present-day Osage County, Oklahoma in the north-central portion of the state between Tulsa and Ponca City.