Everyone from book publishers to magazine concerns to TV networks have been trying to figure out their tablet and iPad strategies. And now the premium cable network Starz partnered with book publisher Penguin in a deal that helps Starz promote an original series and helps Penguin promote its author Ken Follets bestseller The Pillars of the Earth with a so-called “amplified edition.” This is a marketing initiative that can potentially tap into the storytelling potential of iPad. Apple has sold 3 million iPads.