“Phillip Pullman’s writing has been dubbed ‘Harry Potter for grown-ups’, and his Dark Materials trilogy was voted the nation’s third favourite book in the BBC’s Big Read poll.” Now his “Dark Materials,” a two-part, six-hour adaptation of the bestselling epic fantasy, has opened at London’s sold-out National Theatre after “early word-of-mouth praised it as ‘thrilling’, ‘momentous’ and ‘the ultimate children’s show’.”