Earl Spencer says he will publish a new book about his relationship with his sister, Princess Diana, and the events surrounding her death. The work, titled *Swan Song: Diana, My Sister*, is described as personal and is set to be released next month.

According to the announcement, Spencer plans to address what he calls “untruths” about Diana’s marriage to Prince Charles and the aftermath of the Paris crash that killed her in 1997. The outlet framing emphasizes that the book contains previously untold details about their relationship.

The coverage provided centers on Spencer’s intention to use a first-person account to clarify disputed narratives. In the material available, there are no additional, contrasting details from other outlets about specific claims, interview content, or excerpts—so the overall angle remains focused on the timing, the book’s personal nature, and Spencer’s stated goal of correcting inaccuracies related to the marriage and the crash aftermath.