As ticks move into new areas and enjoy longer seasons, they are changing millions of lives, driving up healthcare costs, and infusing a simple walk in the woods or picnic in a city park with fear. Lyme: The First Epidemic of Climate Change is a disquieting look at how Lyme disease has proliferated in a warming world. In it, investigative journalist Mary Beth Pfeiffer combines new research with years of extensive reporting to show how human activities have propelled this growing menace, and how modern medicine has underestimated its danger.