In Depth 'Musk Fictions' (3/6). The ideal library of the SpaceX founder features the bestsellers of the American novelist, delving into free love, libertarian revolt and unbridled space exploration. On April 28, Elon Musk asked his artificial intelligence Grok to define itself. As usual, the Tesla CEO's messaging was cryptic. His posts on X (formerly Twitter), and even the names of his children, often feel like riddles, decipherable only to those in the know. But for newcomers, this moment of self-definition offered a rare clue: The name Grok was an homage to science fiction novelist Robert A. Heinlein (1907-1988). Heinlein, along with Isaac Asimov (1920-1992) and Arthur C. Clarke (1917-2008), is regarded as one of the "Big Three" of the Golden Age of American science fiction, which spanned from the late 1930s to the 1960s. In his 1961 bestseller Stranger in a Strange Land, a Martian uses the word "grok" to describe his way of understanding Earth. Musk echoed the spirit of the novel in a February 2025 post on X, writing: "The word 'grok' means to fully and profoundly understand something." Read more