Pat McCaw, M.D., is a family practice physician and children's author from Eldridge, Iowa. She is passionate about using books to help children with emotional and health issues. In addition to writing, she practices family medicine part-time and is a faculty physician at a medical residency program. Pat teaches classes on how to use picture books in the classroom and writes online educational lessons on science and physiology. If she has any free time, she loves to hike and fish while spending time with her family. Her dog, Poppy, rules the household. Pat's website and blog is found at www.patmccawauthor.com.

Elizabeth H. Stephens, M.D., Ph.D., is an Associate Professor of Surgery in Cardiovascular Surgery at Mayo Clinic, specializing in congenital cardiac surgery. She received her medical degree from Baylor College of Medicine and Ph.D in Bioengineering from Rice University focusing on tissue engineering heart valves. She cares for both children and adults with complex congenital heart disease, with particular expertise in valve disease, heart failure, and heart transplantation.