Much is being made of the sale by Daniel Crouch Rare Books of an original copy of a pictorial map of Prohibition-era Chicago. Published in 1931, A Map of Chicago’s Gangland from Authentic Sources featured the St. Valentine’s Day Massacre and other episodes from Chicago’s gang wars and numerous other scenes of rum-running, police corruption and gang activity. So naturally the authorities did their best to suppress the map. The map will be on display at the London Map Fair this weekend; Daniel Crouch is asking £20,000 for it. But if you don’t have that kind of money, other copies do exist in libraries, such as Chicago’s Newberry Library, which I believe has sold facsimile reprints of the map. See coverage from Atlas Obscura, CBS Chicago and the Daily Mail. [Tony Campbell]