The Spice Girls knew it way back in the day, and we still know it: girls rock. Who run the world? Rebel girls, that's who. This book is perfect for any time you're in need of a shot of wisdom to remind you that independent women kick ass. With quotes from Oprah, Malala Yousafzai, Beyonc , Tina Fey, Amy Poehler, Michelle Obama, Adele, Caitlin Moran and many more, this book lets the world hear us roar.