Instintos Canibales o 12 Dias aka 'Cannibal Instinct or 12 Days' (unreleased Jose Luis Calva novel; 2000s)
Instintos Caníbales o 12 Días (translated as Cannibal Instinct or 12 Days) is an unfinished novel by Mexican serial killer and cannibal José Luis Calva (June 20, 1969- December 11, 2007).
Calva had a very traumatic childhood; his father died when he was two years old and his mother brought men to her house, whom she forced him to call dad. A few years later, he was sexually abused by one of his brother’s friends. His early childhood may have been part of the reason he took the path that he ended up taking. He was married, having originally met his wife in 1996, but it ended in divorce and she ended up moving to the United States with his daughters.
Calva was arrested in October of 2007 when investigators went to his home regarding the case of his missing girlfriend, Alejandra Galeana, who had last been seen on October 6. When police arrived he was in the middle of a meal consisting of human flesh that he had seasoned with lemon. The police soon after found the mutilated body of Galeana. Also recovered from the scene was human flesh in the refrigerator, cooked human flesh, bones in a cereal box, a picture of Hannibal Lector and the unfinished novel Instintos Caníbales o 12 Días. He was charged with two murders, but more are suspected. Ultimately, he committed suicide in prison, just a few months after his arrest.
According to an article online, the novel deals with subjects like cannibalism, sex, sadomasochism, and coprophagia (the consumption of feces). The article also states that there may have been more texts including poetry and similar writings discovered at the scene, but this has not been officially confirmed.
Due to the nature of the texts and the person who wrote them, it is unlikely that they will ever be officially released.