Asimov's base series, trilogy plus two prequels and two postscripts, robot series five, empire series trilogy, and the gods themselves and the end of eternity.

Arthur clarke: Four Space Odyssey, Four Rama Series, The End of Childhood and The Fountain of Paradise.

Heinlein: Star Paratrooper, The Harsh Moon and Citizen of the Galaxy.

Ted Jiang: Babel, Breath-The Destruction of the Universe, The Merchant and the Alchemist's Gate, The Story of Your Life, The Game of Seventy-two Letters and Ender, The Golden Compass trilogy, The Hyperion trilogy, The Dark Elf trilogy, The Hunger Games series and The Hunger Games.

Charlie Wilson time cycle

After reading these works, science fiction is basically an introduction.