Jermaine Jackson will tell "the truth as we know it" about his brother Michael in a new book to be published this year.
The singer said the book, called You Are Not Alone: Michael, Through A Brother's Eyes, would commemorate the life of the star who died in June 2009 at the age of 50.
It will trace Jackson's rise to fame with his brothers and his transformation into a global superstar.
The book will also cover the 2005 trial which saw Jackson accused of sexually assaulting a child and the circumstances around his death.
Jermaine said: "We don't want Michael's life - or death - to be an eternal mystery. This is the truth as we know it. I have read so much about what people think they know about Michael, but this is about what really happened.
"I hope to make sense of the occasions when the outside world struggled to understand my brother's world.
"By sitting down and sharing memories, I hope his millions of fans will see him anew, and that those who have not been so kind will find room for more compassion.
"Everyone has said it all about Michael and us. They cannot say anything more. Now it is our turn.
"The forthcoming trial of Dr Murray surrounds Michael's death, but none of us wish for those proceedings to stand as the final word on how he is remembered.
"We cannot bring our brother back but we can ensure his legacy is never forgotten in a book that commemorates his life - and says the things he never got the chance to say."