Do Robert A. Heinlein and Lyudmila Ulitskaya both write science fiction?
Robert A. Heinlein Robert Anson Heinlein ( ; July 7, 1907 – May 8, 1988) was an American science fiction writer. Often called the "dean of science fiction writers", his sometimes controversial works continue to have an influential effect on the genre, and on modern culture more generally.
L. Sprague de Camp Lyon Sprague de Camp ( ; 27 November 1907 – 6 November 2000), better known as L. Sprague de Camp, was an American writer of science fiction, fantasy, non-fiction and biography. In a career spanning 60 years, he wrote over 100 books, including novels and works of non-fiction, such as biographies of other fantasy authors. He was a major figure in science fiction in the 1930s and 1940s.