On this programme we have a whole host of celebrities lined up to tell you why they love books - from film stars James McAvoy and Chris O'Dowd, to DJ Edith Bowman and gold badge holder Michael Morpurgo. Barney gets a unique insight into this year's 500 Words story-writing competition, and Greg Foot joins us in the studio to explain the science of electricity - but not quite as you would expect! Show less