O Garimpeiro is a novel full of adventures located on the Madeira River in Rondônia, on the occasion of the enormous internal migration that occurred in the 90s. The book presents the region, the invasion by thousands of garimpeiros coming from different parts of the country and particularly from the Serra Pelada mining. Together with them, the reader becomes aware of what this migratory phenomenon was and the impact it had on that region. Along with the exciting story, the entire region is unveiled and customs are preserved through their own unique language.