John Boyne's global bestseller 'The Boy In The Striped Pyjamas' is building up similar momentum as a film. It's now pushed into the US box-office top 10 with a gross of $5.2m after three weeks on a limited release, while Danny Boyle's much admired 'Slumdog Millionaire', which won best film and best director at the British Independent Film Awards is two places behind on £3.6m.