Harry and his wife Meghan, who are formally known as the Duke and Duchess of Sussex, stepped down from royal duties in early 2020 and moved to the United States.
The pair sent shockwaves through the British monarchy in a 2021 interview with Oprah Winfrey when Meghan accused an unnamed member of the royal family of having raised concerns about how dark their son’s skin might be and said her life as a royal had left her on the brink of suicide.
Harry has also spoken about being on a “different path” to his brother, although he and his wife appeared with William and Kate after Queen Elizabeth’s death last month.
The book will be published in 15 languages, including Spanish, French and Chinese, while the English-language edition will be available in the UK, Ireland, Australia, New Zealand, India, South Africa and Canada.
It will be priced at 28 pounds (US$32.43) in Britain, the publisher said, and an audio edition, read by the author, will be released.
Harry will support British charities with donations from his proceeds, the publisher said.