NOTCOT, a favorite source for all things creative and interesting, has featured the short "Story of Keep Calm and Carry On," which chronicles the origins of the poster and its subsequent re-discovery by the folks at Barter Books.
Barter Books is a secondhand bookshop located in Alnwick's old Victorian railway station in Britain. One of Flavorwire's 20 Most Beautiful Bookstores In The World, it is worthy of its own post dedicated to the gorgeous inner workings, preserved tea rooms and waiting rooms.
After winning an auction for a box of antique books, the owners of Barter Books found one of the original Keep Calm posters that the British government had printed during WWII. Thus began a design trend that has swept the world. Take a look at this beautiful video that tells all about the provenance of the iconic poster.