Robert A. Kurson is an American author, best known for his 2004 bestselling book, Shadow Divers, the true story of two Americans who discover a World War II German U-boat sunk 60 miles off the coast of New Jersey.

Robert Kurz was a German Marxist philosopher, social critic, journalist and editor of the journal Exit! He was one of Germany's most prominent theorists of value criticism.

Robert Lloyd Fish (August 21, 1912 – February 23, 1981) was an American writer of crime fiction.

Robert Lull Forward was an American physicist and science fiction writer. His literary work was noted for its scientific credibility and use of ideas developed from his career as an aerospace engineer. He also made important contributions to gravitational wave detection research.

Robert L. Millet is a professor of ancient scripture and emeritus Dean of Religious Education at Brigham Young University (BYU) in Provo, Utah. Millet is a Latter-day Saint author and speaker with more than 60 published works on virtually all aspects of Mormonism. Millet was at the forefront of establishing evangelical-Mormon dialogue.

Robert Lee Scott was an American scholar influential in the study of rhetorical theory, criticism of public address, debate, and communication research and practice. He was professor emeritus in the Communication Studies Department at the University of Minnesota. He is the author of five books, numerous articles in speech, communications, philosophy, and rhetoric journals, and contributed many book chapters. His article "On Viewing Rhetoric As Epistemic", is considered one of the most important academic articles written in rhetorical studies in the past century.

Robert L. Shook (born April 7, 1938) is an American author who specializes in business books.

Robert Lacey is a British historian and biographer. He is the author of a number of best-selling biographies, including those of Henry Ford, Eileen Ford, Queen Elizabeth II and other royals, as well as several other works of popular history. He is best known for his work as historian to the Netflix award-winning drama The Crown. Lacey was educated at Selwyn College, Cambridge, where he studied history.

Robert Langton Douglas (1864–1951) was a British art critic, lecturer, and author, and director of the National Gallery of Ireland.

Robert Lanza is an American medical doctor and scientist, currently Head of Astellas Global Regenerative Medicine, and Chief Scientific Officer of the Astellas Institute for Regenerative Medicine. He is an Adjunct Professor at Wake Forest University School of Medicine.