In 1978 Joan Gussow wrote a ground-breaking book tying nutrition to the health of our planet. Today she discusses her journey through the Good Food Movement and her memoir, "Growing Older: A Chronicle of Death, Life and Vegetables."

Restaurant Nora in Washington, DC was the first certified organic restaurant in the nation. Organic pioneer, chef Nora Pouillon shares her insights from her 40 years as a chef and food activist. Her new book, "My Organic Life" hit shelves April 21, 2015.

Nina Teicholz, the "nutritional Sherlock Holmes," took nine years to craft her new book, "The Big Fat Surprise: Why Butter, Meat, and Cheese Belong in a Healthy Diet." She speaks with Rootstock Radio host Theresa Marquez about what it took to create this enlightening account.