"I was very, very moved by all the support and kindness from so many people," she said. "The reason that I wrote it was to try to communicate and help and connect with other women and other families going through the same thing."
"I'm very happy I made the decision," she told Entertainment Weekly. "I was fortunate to have great doctors and very, very fortunate to have a good recovery and a project like Unbroken to have something to be really focused on, to be getting healthy for and to be able to just get right back to work."
Angelina and fiancé Brad Pitt at the Oscars
Angelina is currently getting ready to release her latest film, Maleficent, which also stars her five-year-old daughter, Vivienne Jolie Pitt.
The Los Angeles-born actress recently explained the Vivienne had only joined the cast as she was the only child on set who wasn't scared of Angelina's dramatic costume and villainous character in the movie.
"I think I'm a Disney character, so when children visit the set, I keep going up to them and smiling but they often cry!" she told Empire magazine. "One even said, 'Mummy, please tell the mean witch to stop talking to me!'"
Overall, however, Angelina said that she had thoroughly enjoyed playing her "favourite" villainess and has used the film to try and bring out the more sympathetic side to Maleficent.
"What I like about her is that she's an awkward, orphaned girl; she grew up in a tree by herself," she said. "She doesn't really fit in, and I think a lot of children will identify with that.
"She deals with abuse in her life, and goes quite dark, and that's the Maleficent that everyone remembers. But there's always a part of her that's struggling for what she thinks is fair and right."