[Source: Reuters]

Charles Spencer, the brother of Britain’s late Princess Diana, is to publish a book about his sister’s life, promising to divulge the ​truth about her ahead of the 30th anniversary of her ‌death.

Diana, the first wife of King Charles, was killed aged 36 in August 1997 when the car carrying her and her lover Dodi al-Fayed crashed in the Pont ​de L’Alma tunnel in Paris as it sped away from chasing ​paparazzi photographers on motorbikes.

“Swan Song: Diana, My Sister” penned by ⁠her brother, known as Earl Spencer, is slated to be released next ​month in Britain and published around the world, telling the story about Diana, from ​his perspective, according to its publisher Michael Joseph, a division of Penguin Random House.

“With the 30th anniversary of Diana’s tragic death on the skyline, I’ve been inundated yet ​again with requests for interviews about my sister,” Spencer said in a ​statement.

“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.”

Diana became the most photographed woman in the world after marrying Charles in ​a glittering ceremony ​in 1981. However, ⁠the marriage turned sour and they eventually divorced in 1996.

At her funeral, Spencer famously delivered a eulogy in which ​he castigated the royal family.

“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,” Spencer said.

Daniel Bunyard, Publishing Director at Penguin Random House, said it ​would be a “book of historic importance”.