I absolutely LOVED this book and my ten and thirteen year old daughters do too. I really appreciated that there is a wide selection of ladies represented from all over the world, including many cultures that are often overlooked. For examples, there are women represented as warrior queens, scholars, poets, physicists, artists, musicians, fossil hunters, nurses, abolitionists, suffragettes, ballerina, fashion designers, agriculturalists, politicians, missionaries, writers, journalists, activists, architects, etc... It is strong mix of creative arts , scientific, anthropological and other fields.
There are some women included that frequently are topics of biographies, such as Helen Keller, Joan of Ar, and Harriet Tubman. There are many that are many much more obscure, but equally fascinating topics: The Night Witches, Phillis Wheatley, Bessie Smith, and Sarah Bernhardt, for example. There are also recent/current ladies included in the volume such as: Natalie Portman, S.E. Hinton & Temple Grandin.
This is a great book because you don't have to read it cover to cover (makes my daughter happy)! My daughter looks through the list of 'girls who rocked the world' and chooses one to read about. Each section is just long enough to grab her attention and give her a little information about that person. There have been a few that she wants to research further.