Nathan Runkle would have been a fifth-generation farmer in his small midwestern town. Instead, he founded our nation's leading nonprofit organization for protecting factory farmed animals. In Mercy For Animals, Nathan brings us into the trenches of his organization's work; from MFA's early days in grassroots activism, to dangerous and dramatic experiences doing undercover investigations, to the organization's current large-scale efforts at making sweeping legislative change to protect factory farmed animals and encourage compassionate food choices.