They call themselves “sister-friends.” Now, two celebrated women’s rights activists from different parts of the globe, Gloria Steinem and Nobel laureate Leymah Gbowee, have turned their unique bond into a children's book. “Rise, Girl, Rise: Our Sister-Friend Journey. Together for All” is a joint biography and a call to action for a new generation. Illustrated by Kah Yangni, the colorful book draws upon a friendship of over 20 years between Steinem and Gbowee, the Nobel Peace Prize winner from Liberia. It traces their childhoods on separate continents, and their paths to activism as adults. In interviews, the authors say that despite the title, the book is for boys, too.