Darcy Wakefield, a runner, teacher, and writer, was always on the go, so when she was diagnosed with ALS, a terminal neurological disease, at age 33, she did what came naturally. She lived what she referred to as a ''fast-forward life," buying a home, comiting to a partner, becoming a mother, and writing about it all in a book published two years later. ''She redefined what it means to be a person with a disease," said her younger sister, Betsy, ''You get a disease like this, and you have choices every step of the way, every day. Her choice was, 'I am not going to be defined by this.'"
