Published by Penguin Press in 2026, this 384-page memoir is the account Charles Spencer has held back for nearly thirty years: the story of his life with his sister Diana, and the week in August 1997 that ended it. In childhood the two youngest Spencers were inseparable, roaming the family estate, enduring boarding schools and terrifying nannies, and helping each other through their parents' divorce. Diana's marriage to the Prince of Wales changed everything. Charles watched his sister become a global icon, serve the world's marginalized, and be adored as a mother to her sons - while a relentless press pursued her as her royal marriage collapsed and left her increasingly alone. The book covers all of it in the close, private detail only a brother who was there could provide, culminating in Diana's death and the eulogy Charles delivered before a watching world at Westminster Abbey. The New York Times called it a brotherly tribute, no holds barred, full of love and vengeance. Tina Brown, writing for Fresh Hell, noted that Spencer was indelibly present in one of the most iconic tableaux of the late twentieth century and that his memoir finally tells us what it was like. For readers of royal history, biography, and the story of Diana specifically, this is the primary source account from the one person closest to her before fame arrived and after it consumed her. Physical details: 384 pages, 9.25 × 6.13 × 0.97 inches, 20.8 oz.