Alberto do Rego Rangel (29 May 1871 â 14 December 1945) was a Brazilian engineer and writer.
He graduated with a degree in engineering from the Escola Militar do Rio de Janeiro, in 1899. The following year, with the rank of Ensign, he commanded an artillery brigade during the Brazilian Naval Revolts. After participating in engineering projects in Maranhão and Pará, he left the army (which he criticized in the pamphlet Fora de forma (Out of Shape), in 1900) and he moved to Amazonas, where he was the general director of Lands and Colonization, under Governor Antônio Constantino Nery.
While he was working for the government in Amazonas, he wrote his first book, a collection of stories titled Inferno Verde (Green Fire). The work was not published until 1908, with a preface by the Brazilian writer and journalist Euclides da Cunha, with whom he had been friends in military school. He entered diplomatic service and traveled to France, England, Spain, and Portugal. In this period, he researched the documents that would become the basis for books on history and biography, as well as continuing to write stories. In the beginning of the World War II, he left his position in the Brazilian consulate in Paris and returned to Rio de Janeiro.