Beating a dead, zombi-fied horse?

I haven't looked up the sales numbers for The Death Cure, the third novel in James Dashner’s bestselling Maze Runner trilogy, but I'm assuming they're amazing... seeing as I just opened a press release announcing the fourth book in the, er, trilogy. According to the fine people at Delacorte Press, a prequel to the series called The Kill Order will come out on August 14, 2012.