Michael V. McConnell, MD, MSEE (LOS ALTOS HILLS, CA), is a cardiologist and clinical professor of medicine at Stanford University School of Medicine. He has worked with Apple, Google, and Fitbit on digital health initiatives and has spent more than 25 years researching heart disease and practicing preventive cardiology. All author royalties from sales of this book will be donated to the American Heart Association and the American Cancer Society.