The release of Andrew Morton's biography, 'Diana: Her True Story', in 1992 reportedly caused significant distress within Buckingham Palace, particularly for Prince Philip. He was upset by the book's perceived bias against the Royal Family and expressed his concerns to Diana, stating that everyone was suspicious of her involvement. Although both Diana and Morton denied her direct participation at the time, it was later revealed that Diana had provided around five hours of recorded material, which formed the basis of the biography. Former butler Paul Burrell recounted that Prince Philip made his feelings clear, which left Diana in denial about the extent of her involvement. She described the aftermath of the book's release as distressing and relied on the support of close friends to cope with the situation. This incident highlights the complexities and tensions within the Royal Family during a turbulent period in Diana's life.