Gospel singer Bebe Winans is releasing The Whitney I Knew on the 31st July.
Winans, who performed at the Houston's funeral in February, will also be including photographs of the pop star that have never been seen in public before.
Houston, who had a history of substance abuse problems, was found dead in the bath of her Beverly Hills hotel room in February and Winans has promised to use the book to reveal "heart-breaking accounts that led to her ultimate defeat."
It was recently confirmed that Whitney's mother Cissy Houston will also release a book about her daughter next February.
She has signed a multi-million dollar deal to write with "candor, honesty and respect" about her daughter, who died as a result of accidental drowning in her bath and effects of heart disease and cocaine use in February.
Gospel singer Cissy said: "When I lost my daughter, the world lost one of the most beautiful voices and an extraordinarily beautiful and charitable woman.
"In sharing our story in this book, I hope to give her fans something to treasure, the way we all treasured Whitney. We are still receiving thousands of letters each day from her fans, and I hope reading this book will provide a deeper understanding into my daughter's true story."
Whitney famously spiralled into drug addiction alongside her husband Bobby Brown, the father of her 19-year-old daughter Bobbi Kristina, in the 90s and Cissy will talk about the issues which this caused in her book.
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