The Golden Compass, out on Friday, is the adaptation of Northern Lights, the first book in Pullman's Dark Materials trilogy. It takes Lyra, played by 13-year-old Dakota Blue Richards, from Oxford to the Arctic as she flees from and then challenges the fiendish plots of the Magisterium's Marisa Coulter (Nicole Kidman), with the help of talking armoured bears and heroic gipsies.