This post by Joey Vigour, the lead designer at Mirror Box Games, is about YA sci-fi author William Sleator and his book Interstellar Pig. Strange as it may sound, Interstellar Pig is the inspiration for the Chaosmos board game that’s close to raising $100,000 on Kickstarter. William Sleator is gone now, but every used bookstore in America has at least one of his books for sale.…