: A middle-aged couple in New York, the Reynolds, start receiving insulting anonymous letters.

: The book serves as a grim portrait of 1970s New York, highlighting the isolation and random violence that can erupt from even the smallest social frictions.

: Soon after, their beloved poodle, Lisa, is snatched while being walked. A ransom note for $1,000 follows.

The file you're referring to, , is a digital copy of the psychological thriller novel A Dog's Ransom (Spanish: Rescate por un perro ), written by the celebrated author Patricia Highsmith in 1972.

: What starts as a "petnapping" quickly spirals into a dark exploration of human cruelty, police corruption, and a "descent into hell" for an idealistic young policeman named Clarence Duhamell who tries to help. Interesting Facts & Context

: Highsmith is famous for her "Ripley" series, and here she maintains her signature style where the lines between "good" and "bad" guys are blurred. The police are portrayed as indifferent and brutal, and the search for the dog leads to a complete disintegration of several characters' personalities.