Robert A. Heinlein (1907-1988) was educated at the University of Missouri and the US Naval Academy, Annapolis. He served as a naval officer for five years but retired in 1934 due to ill health. He then studied physics at UCLA before beginning to publish sf with 'Lifeline' for Astounding Science Fiction in 1939. Among his many novels are Stranger in a Strange Land, The Door into Summer, Double Star, Starship Troopers and The Moon is a Harsh Mistress.