What are you passionate about? Who supports your interest? Have you ever been an activist? In Mustang Wild Spirit of the West by Marguerite Henry, Annie Johnston loves horses. So does her family and her future husband. One day after spying a cattle truck of horses more dead than alive, Annie became an activist. This is her story. What's even more noteworthy is that Annie Johnston, affectionately known as "Wild Horse Annie," actually lived and fought for the survival of mustang. I love this book! Every time I read it, and I have read it multiple times, I am unable to put it aside.