Earl Charles Spencer’s forthcoming memoir about Princess Diana is already available at half its cover price, more than five weeks ahead of its official release.The hardback edition of Swan Song: Diana, My Sister can be pre-ordered on TGJones with a 50 per cent introductory discount, bringing the cost down to £14 from a recommended retail price of £28.The book is due out on September 22 2026, yet the deal means readers can secure their copy now at a significant saving.It represents the first occasion on which Diana’s brother has written at length about the princess, offering previously unshared recollections of one of the most recognisable and culturally important figures of the last century.Earl Charles Spencer’s forthcoming memoir about Princess Diana is already available at half its cover price, more than five weeks ahead of its official release | PENGUINEarl Spencer’s memoir is being published by Penguin Michael Joseph, an imprint of Penguin Random House, with Daniel Bunyard as publisher.World All Language rights were secured from Caroline Michel at PFD, while Penguin Press will handle the American edition.The title will also be translated into 12 languages for a worldwide release.The book arrives as the 30th anniversary of Diana’s death in August 1997 approaches.This represents the first occasion on which Diana’s brother has written at length about the princess | STUART MCCLYMONT, SUNDAY TIMES NEWSPAPEREarl Spencer delivered a eulogy at Westminster Abbey in the days following the tragedy, a speech widely regarded as among the most powerful public addresses of the twentieth century.Nearly three decades on, Swan Song recounts his life alongside Diana as well as the devastating week surrounding her death, drawing on a closeness that no other author could claim.Earl Spencer has explained that the approaching anniversary prompted a fresh wave of interview requests, which ultimately persuaded him to set down his own account.”This has convinced me to write down my own thoughts and memories, once and for all, rather than having the discomfort of again reading the opinions of others, many of which are based on untruths that have become accepted over time,” he said.Princess Diana (left) and Earl Charles Spencer and their two sisters pictured at the funeral of their father in 1992 | PAHe added that the book’s purpose mirrors the spirit of his 1997 eulogy: “The aim of this book is to tell the truth about Diana from her brother’s perspective, just as I attempted to do when speaking at her funeral. As with my eulogy, I want to speak on Diana’s behalf and do so in an openly positive way.”Earl Spencer expressed his hope that younger generations who never witnessed Diana in her prime would come away feeling they understood “who she really was: a one-off, dynamic character, full of love, charisma and self-doubt, who gave life a hell of a go, and left the world a far better place, despite exiting the stage while still so young.”Publisher Daniel Bunyard described the memoir as “a book of historic importance” while emphasising its singular perspective.”Charles Spencer is both a loving brother and an acclaimed memoirist as well as a celebrated historian, and all these facets are brought together in Swan Song,” he said.Mr Bunyard praised Earl Spencer’s distinctive voice, noting his “rare ability to access great emotional depth without sentimentality, honest observation without rancour, and warmth without gloss.”Though the publisher acknowledged that the pages contain “many revelations that will draw considerable attention,” he stressed that readers would ultimately discover “for the first time, but also for all time, a fitting tribute to the beloved woman who was Princess Diana.”The memoir will be released simultaneously across the globe and made available in 12 languages.