He then studied law at the Universidade do Estado do Rio de Janeiro, graduating in 2012.
He debuted in literature in 2009, publishing in the police anthology Assassinos S / A: Brazilian police tales (Editora Multifoco), by the editor Frodo Oliveira and organizer Jana Lauxen.
His first tale to win the pages of a book was "The Teacher" in volume 1 of the anthology, where the great police writer who was to be revealed was already foreshadowed.
Saraiva published the novel under their label Benvirá in 2012.
The gruesome themes present in the story and Montes’ young age earned him widespread notoriety in Brazil.In 2014, Montes published his second novel, Dias Perfeitos (Perfect Days), and as of February 2016, the novel has been released in 14 countries.
Both, first and second books, had the rights sold to film adaptations.
The Village, his third book, is a fix-up horror novel throughout comics draws short stories of macabre characters are told.
The author's fourth book, Jantar Secreto (Secret Dinner), has divided opinions in 2016 when it was discovered that cannibalism was the main theme but both sides confirmed that it was the best book written by Montes.