Princess Diana’s Brother Charles Spencer to Release Book in September

Charles Spencer, the brother of the late Diana, Princess of Wales, is set to release a new book centered on his sister in September 2026, according to reporting from the Dutch news outlet NU.nl. The publication details the upcoming literary project as a focused examination of Diana’s life, adding to the extensive body of work surrounding the late royal’s enduring cultural footprint.

Publication Timeline and Project Scope

The book will arrive in bookstores in September 2026, bringing fresh attention to the Spencer family history. Charles Spencer, who serves as the 9th Earl Spencer, has previously written several historical non-fiction works, including memoirs and deep dives into aristocratic lineages. According to the coverage by NU.nl, this upcoming volume specifically addresses his sister, providing an intimate perspective from within the Spencer family.

Industry observers note that literary projects concerning Diana, Princess of Wales, continue to command significant global interest decades after her passing in August 1997. By framing the narrative through her brother’s direct familial lens, the September 2026 release offers a distinct departure from unauthorized biographies and third-party historical overviews.

Literary Context and Prior Works

The Earl Spencer is well-established as an author, having published titles such as A Very Private School, a memoir detailing his experiences at Maidwell Hall, and The Perdicions: The Story of an English Family and an American Tragedy. His positioning as both a close family member and a published historian provides a unique framework for examining Diana’s early life and public legacy.

Publishers have not yet disclosed the full promotional schedule or international distribution details for the September 2026 launch. However, initial announcements from NU.nl indicate that the project is firmly on track for its autumn release window, drawing immediate attention from entertainment and literary commentators tracking royal publications.