Clifford N. Geary (February 26, 1916 – May 31, 2008) was an American illustrator, who illustrated science books and science fiction novels, especially Robert A. Heinlein's "juvenile series" published by Scribner's from 1948 to 1956.
Many of his Heinlein illustrations are done in a reversed-ground white-on-black style. Alexei Panshin's "Heinlein in Dimension" (a controversial work that Heinlein is said to have disavowed) acknowledges Geary's contribution to this important element of the Heinlein oeuvre, calling his work "quite unusual and quite striking."
Geary was raised in the Boston area and was educated at the Massachusetts School of Art. In later life he lived in Brooklyn and the Adirondacks. His book illustrations were sometimes credited to "Clifford Geary".
Ticonderoga: A Picture Story, by Clifford N. Geary, David McKay Company, New York, 50 p.Space Cadet, 1948Red Planet, 1949Farmer in the Sky, 1950Between Planets, 1951The Rolling Stones, 1952Starman Jones, 1953The Star Beast, 1954Time for the Stars, 1956The Unpleasant Profession of Jonathan Hoag (collected stories), 1959 (not in the juvenile series)Atoms Today & Tomorrow by Margaret O. Hyde, revised edition, McGraw Hill, 1959Exploring Earth and Space by Margaret O. Hyde, McGraw-Hill, 159 p., various years 1957-1967Where Speed is King by Margaret and Edwin Hyde, McGraw-Hill, 1955, 1961Signal Hill by Edward A. HerronClara Barton, Red Cross Pioneer by Alberta Powell Graham, New York: Abingdon Press, 1956Science the Super Sleuth by Lynn Poole, McGraw Hill, 1954Your Trip into Space by Lynn Poole, McGraw-HillThe Hideout Club by Frank Reilly, Rinehart, 147 p., 1948The Magic Bat by Clem Philbrook, Macmillan, 1954The Real Book About Space Travel by Hal Goodwin, Garden City Books, 1952 