What happens if you return, unrecognised, to place and situation you left long ago? Will you be seen as a ghost by some, and a threatening presence by others? Can you alter the past or influence the future? When Prince Harry arrives at Balmoral to convalesce after a bungee-jumping accident in Bali, he is accompanied by Sister Julia, a plain-looking nurse who dotes on her charge. Julia provokes instant dislike and suspicion in two senior royal servants, the formidable housekeeper Janet McDuff and Prince Charles' equerry David Baron. How does she know her way around the castle when she first arrives? Why do the famous corgis love her? Why does she greet Prince William as if she has known him all his life? And how does she recognise a sapphire engagement ring, now belonging to Camilla, when it falls under Harry's bed? "Diana, The Ghost Biography" is the witty and sympathetic account of Sister Julia's experiences among the castle's frosty inhabitants.How does the Queen react when her wild-boar sausage barbecue is interrupted by an unscheduled visitor? Will the nurse be arrested for spying on Charles and Camilla?