Percy Greg (1836–1889) was an English writer and journalist who made significant early contributions to the science fiction genre. The son of essayist William Rathbone Greg, he began his writing career in the mid-nineteenth century. During the 1850s, Greg wrote under the pseudonym "Lionel H. Holdreth" for The Reasoner, a prominent secularist and freethinking periodical published by George Jacob Holyoake. Greg's involvement with the publication was substantial enough that he briefly took over editorial duties in 1859 during Holyoake's illness.
Greg is most remembered for his seminal 1880 novel, Across the Zodiac: The Story of a Wrecked Record. This work is widely recognized as a foundational text in early science fiction and is considered by many literary historians to be the progenitor of the "sword-and-planet" subgenre. The novel details a voyage to Mars and is notable for introducing what is believed to be the first usage of the word "astronaut" in the English language. Furthermore, Greg constructed an imaginary Martian language for the book, which represents one of the earliest instances of a fully realized artistic language complete with its own described grammar and linguistic structure.
Beyond his contributions to speculative fiction, Greg's imaginative depiction of Martian society and space travel left a lasting legacy. In recognition of his pioneering role in shaping the lore of the Red Planet, a crater on Mars was named "Greg" in his honor in 2010. His work remains a key point of study for historians of early science fiction and constructed languages.
