I'm assuming you're referring to the book "Satanás" (which translates to "Satan" in English) written by Colombian author Gustavo Álvarez Gardeazábal.
Hope this review helps!
The author's writing style is characterized by a lyrical and poetic prose, which adds to the overall sense of unease and foreboding that pervades the novel. The characters are well-developed and complex, with the protagonist being a particularly fascinating study of a man torn apart by his own dark impulses.
One of the most striking aspects of "Satanás" is its use of symbolism, particularly the figure of Satan himself. Álvarez Gardeazábal employs Satan as a metaphor for the darker aspects of human nature, rather than a literal embodiment of evil. This allows for a nuanced exploration of the human condition, highlighting the capacity for both good and evil that resides within us all.