H. G. Wells
Herbert George (better known as "H.G.") Wells was one of the first science-fiction authors EVER, and also one of the first fa/tg/uys. In 1913 (about 20 years after writing his more well-known sci-fi books) he wrote "Little Wars; a game for boys from twelve years of age to one hundred and fifty and for that more intelligent sort of girl who likes boys' games and books." He is therefore the father of modern war gaming and should be venerated as the Imperium venerates The Emperor. That's right, he basically created miniature war gaming. The book is free if you have googlefoo and its worth a read if you play any tabletop war game.
He is perhaps better known for his highly influential novels The Time Machine, The Island of Dr. Moreau, The Invisible Man, and War of the Worlds, the latter of which was adapted into a radio drama by Orson Welles. It turned out so convincing that people actually fled their homes, thinking it was a news broadcast and that Martians were landing.
Some of his books are so old that even Disney can't get copyright extended long enough to engulf them; these are available from Project Gutenberg so you do not need to search /rs/.