In her third book in the Dr. Abby Wilmore Series, Sandra Cavallo Miller weaves a new riveting tale of medical adventure and mystery, set amidst the splendor of the Grand Canyon In this riveting third book of the Dr. Abby Wilmore series, Dr. Abby returns to her medical clinic in Grand Canyon National Park. Happy to be reunited with her staff and her partner, Dr. John Pepper, Abby is back treating park visitors and personnel as well as local residents. However, a wave of heart attacks among apparently healthy hikers creates a new puzzle, and soon there are rumors of people using performance-enhancing drugs. Abby s situation deteriorates when a new female friend suddenly disappears, and Abby berates herself for missing the woman s depression.As Abby struggles with the disappearance of her friend, Dr. Pepper is preoccupied by a mysterious threat from his past and becomes badlyinjured in an apparent fall. While he recuperates, Abby takes over much of the clinic work while they provide a home for Pepper s troubled teenage niece and an adopted stray dog.Abby soon discovers that there is something more sinister behind the recent troubling events. In this exhilarating follow-up to The Color of Rock and Where Light Comes and Goes, Abby must learn to confront her past in order to stand up for the ones she loves.