Following the National Theatre's success with plays based on novels by well-loved children's writers like Philip Pulman ("His Dark Materials"), Jamila Gavin ("Coram Boy") and Michael Morpurgo ("War Horse"), the National now stages Mark Ravenhill's exhilarating adaptation of Terry Pratchett's witty and challenging adventure story in a major Christmas production for 2009. Its a parallel world, 1860. Two teenagers thrown together by a tsunami that has destroyed Mau's village and left Daphne shipwre...