 He was also a nudist; nudism and body taboos are frequently discussed in his work.At the height of the Cold War, he built a bomb shelter under his house, like the one featured in "Farnham's Freehold".After "For Us, the Living", Heinlein began selling (to magazines) first short stories, then novels, set in a Future History, complete with a time line of significant political, cultural, and technological changes.