"National Treasure" is probably the first of a string of films set to cash in on the "Da Vinci Code", "Angels and Demons", "Rule of Four" phenomenon that has set the world of paperback fiction alight over the past year or so. Like most of these novels , "National Treasure" popularises some hitherto arcane secret society knowledge and combines this with riddle solving ,treasure hunts and fast paced action sequences.To an extent it works fairly well; the film is entertaining and keeps your attention right to the end ,with the plot a sort of combination of the "Da Vinci Code" and "Rule of Four". However it could have been a lot better ;the cast of the movie were Hollywood "B" team and the choice of incidental music was inappropriate to say the least.While Nic Cage and Sean Bean were entirely convincing in their action set pieces,I thought both of them , especially Bean and his goons, were miscast as quick-thinking, puzzle solving historical scholars. They looked more like heavy-drinking brickies who would collectively struggle at solving the Daily Star crossword. No doubt a really stunning movie will translate the success and style of this paperback genre onto the big screen in the near future; something with the quality of say one of the "Bourne" films perhaps. "National Treasure" falls short of this standard, although it is an appealing enough movie and better than many recent thrillers.