The $80 billion U.S. beer market is truly cut-throat, ideal turf for an insidery, tell-all blog that covers the latest maneuvers of the biggest brewers Anhueser-Busch, Miller Brewing and Adolph Coors.

One blog that has been terrorising the market leader, Anhueser-Busch (maker of the world’s least-drinkable lager, Budweiser) is Brew Blog. Last week, it reported with remarkable detail what appears to be  an aggressive AB pricing push this summer, discounting its Bud Light brand to restore its place in the market. "Will pricing be a way to accomplish that?", the blog asks in a post last week.

How does Brew Blog know so much about the beer industry and the potential movements of the market leader? It’s written by James Arndorfer, a former reporter and now employee of AB’s biggest rival, Miller. According to the Wall Street Journal, Brew Blog leaked the news that AB was launching a new brew for the summer, Budweiser American Ale, ahead of AB’s press launch.

Not an easy one to swallow.