World's most expensive printed book makes rare appearance

A page from the world's most expensive printed book, a first edition of John James Audubon's "The Birds of America", seen as it makes a rare public appearance from its vault at the Glasgow Mitchell Library. The precious book is kept under lock and key in a special vault, but it belongs to the public and anyone can view it by prior arrangement - providing they are supervised and have proof of identity. [File Photo: VCG]