People magazine have revealed some of the details of the memoir written by Whitney Houston’s mother, Cissy Houston. Whitney died almost a year ago, in a hotel bathroom in Beverley Hills, on the eve of last year’s Grammy Awards. In the book, Remembering Whitney, Cissy reveals that she is angry that Whitney died alone. She also reveals that – unlike many others – she does not blame Bobby Brown for her daughter’s drug problems.

“I'm angry she died alone, in those conditions," says Cissy. "I'm still mad about that." Cissy struggled to curtail Whitney’s drug use though, worried that she would end up pushing her away completely. “She started partying and she didn't really know how to stop… I used to wonder what she was doing at night, where she was.” Cissy explains that although she was shocked to see Whitney’s gaunt appearance at the 2001 Michael Jackson tribute concert, she did not express her concern to her daughter. “What was the point?" Cissy asks in the book. "I didn't want her to run completely away from me.

On the subject of Whitney’s ex-husband Bobby Brown, Cissy explains that although Bobby’s treatment of Whitney was wrong, she does not blame him for the fact that she developed drug problems. “I blame him for the way he treated her," she writes, "but I don't blame him for her drug problems." Still, she adds: "He was no help to her at all." Remembering Whitney will be published by Harper Collins. 

Watch footage of Whitney's daughter Bobbi Kristina Brown ariving at her wake