As we stuff ourselves with plumped-up turkeys, unwrap the latest useless gadget, and gather round the family tree, what real relevance does the festive season have and why do we perpetuate it? The Xmas Files is designed to be a fun book, but one underpinned by an exploration of some real issues. The way we celebrate Christmas says a lot about the way we relate to each other, our society, and our values. Stephen Law takes a look at such things as Bertrand Russell's turkey, the existential angst of Santa, and peace on earth to produce a humourous, varied, and thought-provoking collection.