"Half the Sky" is a book written by Nicholas Kristof and Sheryl WuDunn that highlights the struggles faced by women around the world. It discusses issues such as gender inequality, poverty, and violence against women, emphasizing the need for social change and empowerment. The authors argue that investing in women and girls can lead to significant improvements in global development. They provide real-life stories and examples of women who have overcome adversity, illustrating how education and economic opportunities can transform lives and communities.