"I have always been drawn to darkness," Elaine Leeder writes. "I know I always championed the underdog." As a sociology professor at Ithaca College in the 1990s, she began teaching at Elmira Correctional Facility in upstate New York. When she moved to California, that same desire to help led her to the prison education program at San Quentin. Then, inspired by her lessons, a group of Leeder's students approached her about working with a program the...