Charles Spencer to Publish Book About Princess Diana in September 2026

Charles Spencer, the 9th Earl Spencer and Princess Diana's younger brother, is publishing a book about his late sister. Titled "Swan Song: Diana, My Sister," it is scheduled for release on September 22, 2026. Spencer said a flood of interview requests ahead of the 30th anniversary of Diana's death prompted him to write his own account rather than keep answering others' questions.