Winter Holiday

''You know what it''s like. Dark at teatime and sleeping indoors: nothing ever happens in the winter holidays." Or so Nancy thinks. Then the lake ices over completely and the Swallows and Amazons, along with Dick and Dorothea -- ''the D''s'' -- plan a race to find the North Pole. How will they reach it if they can''t sail? By sledges of course! But when a blizzard blows up and there is a mix up about signals, the D''s disappear into the Arctic night. Disaster looms. Can the Swallows and Amazons save their friends?