A new book about the late DIANA, PRINCESS OF WALES claims she married Prince Charles for his title and lied about throwing herself down the stairs when she was pregnant. The book, which coincides with the tenth anniversary of the princess' death in a Paris, France car crash in August 1997, has been written by her friend, the New Yorker editor Tina Brown. Among other claims, Brown alleges Diana and Charles had sex on the royal train before they married - and that Charles only cheated on the princess after her eating disorders and hysteria became too much to endure. Other friends of the Princess have denied the claims in the book, which will be released on 12 June (07) in the US and UK.