Can you change the world with your wallet? -You already do. in this frank, teen-friendly manifesto, Mara Rockliff reveals what you're really buying when you spend your money on a cell phone, a cheap t-shirt, or fast food-and shows the way to better choices, both for people and the planet. When she's not spreading dangerous ideas, Mara Rockliff can be spotted loading up on books at her town library, biking to a nearby farm for fresh ingredients for homemade ice cream, or fixing yet another mug of fair trade tea. in real life, she lives in eastern Pennsylvania with her family.