Books like the river of doubt

The Roosevelt River (Rio Roosevelt, sometimes Rio Teodoro) is a Brazilian river, a tributary of the Aripuanã River about 760 kilometres (470 mi) in length.

The Roosevelt River begins in the state of Rondônia and flows north into Mato Grosso. It is fed by the Capitão Cardoso River, which meets it at the state boundary. In Mato Grosso the river forms the western boundary of the 164,224 hectares (405,810 acres) Guariba-Roosevelt Extractive Reserve, a sustainable use unit created in 1996. After entering Amazonas the river forms the border between the 83,381 hectares (206,040 acres) Manicoré State Forest, a sustainable use conservation unit created in 2005 and the 72,296 hectares (178,650 acres) Guariba State Park, also created in 2005. The river then runs through the Campos Amazônicos National Park, a 961,318 hectares (2,375,470 acres) protected area created in 2006 that holds an unusual enclave of cerrado vegetation in the Amazon rainforest. It continues north until it joins the Aripuanã River. The Aripuanã then flows into the Madeira River, thence into the Amazon.