Swan Song: Diana, My Sister is a deeply personal and raw memoir by Charles Spencer, the 9th Earl Spencer, published on September 22, 2026. Written nearly three decades after Princess Diana's tragic passing, the 384-page book serves as an intimate brotherly tribute that strips away the royal myth to reveal the real woman behind the global icon.
The narrative is structured around three core phases of Diana's life:

1. An Inseparable Childhood

The book opens with a tender, nostalgic look at the Spencer siblings' early years growing up at Park House on the Sandringham estate. Charles reflects on the tight, protective bond they formed while navigating the painful, public divorce of their parents and enduring strict, often harsh boarding schools. He shares intimate details of their childhood, including the private nicknames they used for each other�"Duch" for Diana and "Carlos" for Charles.
2. The Isolation of Royalty

Spencer chronicles the drastic shift in Diana's life after her fairytale marriage to the Prince of Wales (now King Charles III). He describes how his sister was rapidly transformed from a shy teenager into the most famous�and aggressively hunted�woman in the world. The memoir highlights her growing isolation within the royal family and the relentless, often barbaric harassment she faced from the paparazzi.

3. Grief and Retribution

The final portion of the book focuses on the devastating aftermath of her death in 1997 and the enduring weight of grief. The tone shifts here into a sharp indictment of the institutions�both the British media and the Royal Household�that Spencer believes failed to protect his sister.