" Apaporis: Viaje a la Última Selva ," by Alfredo Molano and María Constanza Ramírez, is a significant 2002 literary work documenting a 1997 expedition through the Amazon, highlighting indigenous resilience and environmental threats. The text, often sought in PDF form due to limited physical availability, explores the history of the Apaporis River region, heavily influencing the 2010 documentary "Apaporis: Secretos de la Selva".