LONDON (AP) -- It is a truth universally acknowledged that a Jane Austen novel in possession of added gore will be a surefire best-seller. That's the conclusion reached by publishers since the success of "Pride and Prejudice and Zombies," an unlikely literary sensation created by adding dollops of "ultraviolent zombie mayhem" to Austen's classic love story. "Zombies" " billed as 85 percent Austen's original text and 15 percent brand-new