Claire Kells is a physician and writer, whose best-selling debut adventure novel Girl Underwater was released in 2015. An avid open water swimmer and outdoor enthusiast, Claire gravitates toward stories of survival, struggle, and redemption. Her experiences as a practicing physician also play an important role in her novels, and she's grateful for all the fascinating stories her patients have told her over the years. Vanishing Edge is the first installment in a new series featuring a partnership between an ISB agent and park ranger, who solve mysteries set in the National Park system.