Ten years ago, Richard Askwith wrote Feet in the Clouds, which became something of a cult title among the running community. It was an account of his battle with the notorious Bob Graham Round - a 66 mile, 27,000 ft circuit of a mere 42 of the highest peaks in the English Lake District, and all in under 24 hours.

His more recent title, Running Free, not only continues his adventures in running in, through and sometimes away from nature, but also looks at a bigger question - why has a sport that should be free for all become so commercialised? Why do people pay £50 to do an obstacle course they could do for free in a muddy field?
He will be here on Monday 31 March at 2pm GMT to answer these and any other questions you care to ask.