Christmas Formula: From their pens to your ears, genius in every story

Six has always been a number we group things around - Six of the best, six of one half a dozen of another, six feet under, six pack, six degrees of separation and a sixth sense are but a few of the ways we use this number.

Such is its popularity that we thought it is also a very good way of challenging and investigating an author's work to give width, brevity, humour and depth across six of their very best.

In this series we gather together authors whose short stories both rivet the attention...