Right now I am reading one called GRASSROOTS GARDENING: Rituals for Sustaining Activism by Donna Schaper. I am still in the Preface but here is a great quote.
As a gardener, I have a front-row seat on global warming and the many other idiocies of capitalism untamed. Humanity is headed for a brick wall of inequality and injustice that breeds war and destroys the air. I believe we can change; that is what makes me an activist. I garden to remind myself of my hope.