Whitney Houston's mother, gospel great Cissy Houston, is prepping a memoir on her famous daughter that promises to tell the "unabridged and unbelievable" story of Whitney's career.

According to the The Associated Press, the as-yet untitled book is scheduled to come out in February, one year after the Grammy-winning singer [article id="1679029"]died[/article]
 of accidental drowning in her Beverly Hills hotel bathtub on the eve of the Grammys at age 48.

"When I lost my daughter Nippy (Whitney Houston's nickname), the world lost one of the most beautiful voices and an extraordinarily beautiful and charitable woman," Cissy Houston said in a statement released by the book's publisher. "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."

Publisher HarperCollins promised that Cissy Houston would write with "candor honesty and respect," in chronicling her daughter's career heights, as well as Whitney's legendary drug problems, tumultuous marriage to singer Bobby Brown and her own grief.

"She will tell the unabridged and unbelievable story of her daughter's life as well as her own, addressing Whitney's brightest and darkest moments while helping fans around the world understand the complexities of this extraordinary star who died much too soon," the publisher said.

A portion of the proceeds from the sales of the book will be donated to Newark, New Jersey's New Hope Baptist Church, the house of worship where Whitney grew up singing in the choir, as well as the church where her funeral was held.

"Ultimately, Cissy will go behind the headlines to show the true, human side of this strong, successful yet complicated musical icon, capturing the dramatic depths and soaring range of an extraordinary woman, along with the pain and heartbreak of a grieving mother as she struggles with impossible loss," according to the publisher.

Before Houston's book hits shelves, a documentary focusing on the 48 hours leading up to this year's Grammy Awards will premiere on June 11 at the Academy of Television Arts & Sciences. The 26-minute movie will look at how the show dealt with Houston's death and include interviews with host LL Cool J, Dave Grohl of the Foo Fighters, Bruce Springsteen and Jennifer Hudson.