Before segueing into contemporary romantic suspense, where she soon became the American rival to Mary Stewart and Victoria Holt, Phyllis A. Whitney wrote historical novels about strong young women who came into their own as adults, amidst trappings of mystery and secrets. Although the suspenseful elements are there, "The Trembling Hills," like others Whitney wrote in the 1950s, is more about characters changed by the events they live through. Here, that event is the San Francisco Earthquake and Fire of 1906. Sara Jerome has returned to her native San Francisco, from which her widowed mother fled years before. Sara is hungry for life--for love, for luxury, for excitement, for belonging--and the novel follows her attempts to get what she wants, as she discovers her past and navigates the present. Whitney creates believable, fully realized characters, whom the reader comes to care about. The events of the Earthquake and its aftermath are vividly described and integral to the plot, but it's ultimately the various characters' arcs that will linger after the final chapter in this enjoyable visit to early San Francisco.