Cissy Houston and Whitney Houston
Cissy Houston and daughter singer Whitney Houston attend the 2010 Keep A Child Alive's Black Ball at the Hammerstein Ballroom in New York City on September 30, 2010 in New York City. (Photo by Stephen Lovekin/Getty Images)

Whitney Houston’s iconic legacy will soon come to life in a book written by her mother, Cissy Houston.

Cissy has inked a book deal with HarperCollins to write a memoir that will reveal the “unabridged and unbelievable story” of her daughter’s life.

The Grammy Award winning singer died in a Beverly Hill, California hotel bathtub February 11, at the age of 48.

HarperCollins announced yesterday that the currently untitled book is scheduled to come out next February, to coincide with the one-year anniversary of the “I Will Always Love You” singer’s death.

“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 said in a statement released by HarperCollins. “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.

Cissy will address “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 announced. “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 HarperCollins, Cissy will write with “candor, honesty and respect” about her daughter’s remarkable career and about her drug problems and her marriage to Bobby Brown.

A portion of the proceeds from the book will be donated to New Hope Baptist Church in Newark, N.J., where Whitney grew up singing in the choir and where her funeral was held.

Follow Chris Witherspoon on Twitter at @WitherspoonC