Richard Horne, whose pen name was Harry Horse (9 May 1960, Coventry – c.10 January 2007, Papil, West Burra), was an English author, illustrator and political cartoonist. He was also known as lead singer of the band Swamptrash. Born and raised in Coventry, Warwickshire, he moved to Edinburgh in 1978, where he adopted his pen name.
His first book, Ogopogo, My Journey with the Loch Ness Monster, was published in 1983. He also wrote the The Last... series of books; this included The Last Polar Bears, which was adapted into a 30-minute cartoon for CITV and a touring theatre production for the National Theatre of Scotland, and The Last Castaways, which won the Nestlé Smarties Book Prize.
From 1987 to 1992 Horne was a political cartoonist for Scotland on Sunday and The Scotsman; he also drew until his death in 2007 for the Sunday Herald newspapers. His illustrations also appeared regularly in The Observer and The Independent newspapers.
In 1993 he created, designed, and wrote a point-and-click adventure game for Time Warner called Drowned God: Conspiracy of the Ages. The game was based on a forged manuscript he had written a decade earlier, purporting to have been written by 19th-century poet Richard Henry Horne, who shares Horse's name.