As of now, you can download Reamde by Neal Stephenson from Amazon (US, ES) for only $2.99. I reviewed this title in Spanish a few months ago.
This is the synopsis of the novel:
From the extraordinary Neal Stephenson comes an epic adventure that spans entire worlds, both real and virtual.
The black sheep of an Iowa farming clan, former draft dodger and successful marijuana smuggler Richard Forthrast amassed a small fortune over the years—and then increased it a thousandfold when he created T'Rain. A massive, multibillion-dollar, multiplayer online role-playing game, T'Rain now has millions of obsessed fans from the U.S. to China. But a small group of ingenious Asian hackers has just unleashed Reamde—a virus that encrypts all of a player's electronic files and holds them for ransom—which has unwittingly triggered a war that's creating chaos not only in the virtual universe but in the real one as well. Its repercussions will be felt all around the globe—setting in motion a devastating series of events involving Russian mobsters, computer geeks, secret agents, and Islamic terrorists—with Forthrast standing at ground zero and his loved ones caught in the crossfire.