IMO Hemingway's wickedly dark "The Shor Happy Life of Frrancis Macomber" is a great short story, good place to start with Hemmingway. I tremendously enjoyed his novella "The Old Man and the Sea" and his first major novel "A Farewell to Arms". With respect to Updike, I enjoyed the four Rabbit novels, and recommend them. One Hundred Years of Solitude is the place to start with Garcia Marquez, but I also heartily recommend The General in His Labyrinth. Vargas Llosa ought to be more highly regarded in the United States. My favorite work of his is The War at the End of the World, although Aunt Julia and the Scriptwriter would probably have more general appeal.