Given the current concern over a potential coronavirus pandemic, this remarkable book is prescient by capturing the mood perfectly of a contagion, specifically the chaos and confusion. In this story, individuals fall asleep and can’t be aroused; sleep is associated with a profound dream state and is fatal in many cases. This story is not about the medical/scientific search for the cause and cure; the focus is on residents caught in an eventual quarantine. Ms. Walker previously has captured the devastating consequences of an unexpected and unexplained catastrophe in her earlier (2012) book The Age of Miracles. A topical and riveting read.