Audrey Hepburn is known for her beauty and her movies, she is beautiful both on the outside and on the inside, she was kind and humble. After her retirement in Hollywood, she lived a quiet time in Switzerland, until she became involved with UNICEF.

Audrey may be a shy and reserved person, but she was never weak, she was a fighter and a warrior, just like the title of the book, strength manifests itself in different ways and hers was raising her voice to those who needed it. 
She was not only the pretty face to raise funds, she got completely involved, made visits to countries in need and sometimes went to war zones, she cared about people and was fond of children, she understood their pain because she also lived something similar (she grew up under the domination of the Nazis).  
She raised her voice for those who could not do it on their own, to get them food and medicine, and try to give them a better life. Traveled to dangerous areas, mixed with people, listened to them and offered her support and comfort, they were happy to see her, right there she was not a famous actress or a fashion icon, she was helpful, she was empathetic and kind.

This is a very well-documented biography, the bibliographic record is extensive and among the collaborations is the youngest son of the actress, providing more intimate and unknown stories.

She is one of my favorite actresses, I started watching classic movies because of her, I have read other biographies and I knew she worked with UNICEF but I did not know much about what she was involved, usually her biographies focus on her movies and fashion style, with a small mention of what she did after retiring. Audrey was a great actress and even a great person, I wish her humanitarian work was also just as admired and inspiring, as well as her iconic fashion style.

If you're Audrey a fan or want to know how UNICEF works, this biography might interest you.