Jack Mayer is an American physician and author who writes historical fiction and non-fiction focused on humanitarian stories. His most notable work, *Life in a Jar: The Irena Sendler Project* (2011), tells the true story of Polish social worker Irena Sendler, who saved 2,500 Jewish children during the Holocaust, and the Kansas students who brought her story to light. Mayer's writing combines meticulous historical research with compelling narrative, often exploring themes of courage, moral responsibility, and the impact of ordinary people performing extraordinary acts. A longtime family physician in Vermont, he brings both medical expertise and deep humanism to his storytelling, illuminating overlooked heroes and their legacies.