British Book Publishers Fear Brexit Will Bring a U.S. Invasion - The New York Times

Much of the worry stems from a looming fight with American publishers over sales in Continental Europe. For decades, the British have had this market to themselves, selling English-language editions of books in France, Italy and every other country in the European Union.

That helped turn Britain into the largest book exporter in the world, with total sales equivalent to $6.8 billion per year, according to the Publishers Association, a British trade group. Just over half of that revenue came from exports, and the biggest export market is Europe.