Robert A. Heinlein's work, while ancient and written in a long dead-language, was still quite popular on Earth. A field of study had developed, devoted to comparing the works of Heinlein and his colleagues with the realities of space travel.
Jennifer Logan, an expert in Middle English, enjoyed Heinlein's works. Heinlein's short story "The Man Who Sold the Moon" once gave Logan the inspiration she needed to design an illusion that allowed the G'BurT'Kai civilization to defeat the M'Sak barbarians.
Long before the arrival of the Race's Conquest Fleet in 1942, Robert A. Heinlein had envisioned and realistically portrayed several fully-formed extraterrestrial societies in his novels and short stories. He continued writing after the Race's arrival, though his genre's popularity dropped off.
Sam Yeager was a fan of Heinlein's writings. Yeager attributed his ability to deal with members of the Race as people with a mental flexibility given to him by his readings of Heinlein. Heinlein and fellow writer Theodore Sturgeon were photographed with Yeager in the 1950s.