The publication of the new novel from Colombia's foremost writer has been brought forward after pirated copies went on sale across the country.
Fans have waited 10 years for the latest novel
The Nobel prize-winning Gabriel Garcia Marquez' new book was not due to be released until the end of the month.
Now copies are being rushed into shops early to counter the counterfeiters.
The BBC's correspondent in Medellin says vendors have been tapping on car windows, offering the long-awaited novel at half the official price.
Fans of Mr Garcia Marquez have been waiting 10 years for his latest offering, which has sparked even more interest than usual because of its title, Memories of My Melancholy Whores.
The novel tells the story of an old man who remembers all the women in his life while making love for the last time.
Garcia Marquez is famed for classics such as One Hundred Years of Solitude and Love in the Time of Cholera, and his novels are always much anticipated in Latin America.
He won the Nobel Literature prize in 1982.
Book piracy is common in Colombia, where many best-sellers are illegally copied and sold on the street.
Buyers can not only find books but music and Hollywood movies that have not even reached the country's cinemas.