Ray Bradbury wrote science fiction books.
He used to write science fiction books.
Harry Potter is not exactly science fiction; it is fantasy.Harry Potter is not exactly science fiction; it is fantasy.Harry Potter is not exactly science fiction; it is fantasy.Harry Potter is not exactly science fiction; it is fantasy.
Orson Scott Card has a wonderful book called How To Write Science Fiction and Fantasy. Ben Bova has a book called The Craft of Writing Science Fiction That Sells. These books may be at your public library or you can buy them on Amazon. They would be very valuable to explain how to write science fiction. You may also want to attend writer's panels at science fiction conventions and meet other authors, publishers and editors.
Asimov didn't write just in one genre, but his fiction was largely Science Fiction.
also earned a reputation in the science-fiction world during the 1980s when he wrote a few books.
Authors write whatever they like. People who write science-fiction like that, and people who like newspaper articles write those instead.In writing a science fiction story, anything is possible, or fantastic ideas may come to life. And an author might find a science fiction story more interesting to build than to state and report facts in a newspaper article.
Gary Blackwood writes children's fiction, historical fiction and science fiction.Some of his most famous books are:The Shakespeare StealerShakespeare's ScribeShakespeare's Spy
he is a computer geek who liked to stay at home with his mother and dream about figures.
Lois Lowry writes books in the genre classified as science fiction and realistic fiction
Ernest Hemingway wrote Bibliography books.
Samuel Delany was a black gay science fiction author. He wrote  Dark Reflections which had a gay black poet.