Paula McLain has finally written her World War II novel, but it's not at all what you might think. Her latest book Skylark (#1,341) opens with a reclamation expert combing the remains of Notre Dame Cathedral after the disastrous fire of 2019. She comes upon a small glass fragment etched with the outline of a bird. That's the hook Ms. McLain uses to interweave two stories of Paris: one set in the 1660s and one set in the period leading up to and including the Nazi occupation in WWII. Both use the extensive tunnels excavated below the city of Paris from Roman times to the present as an important story element.
Aloutte lives in the fetid enclave of Sant-Marcel, home to the influential dyers' guild. Her father is obsessed with perfecting a unique shade of red. Aloutte learns the fundamentals of dying from him, but in the own experimentation she finds her own unique color. Both are framed for withholding their knowledge from the Guild and sentenced to imprisonment. Aloutte must survive the infamous Salpetriere's women's prison for three years if she is to have any hope of ever being released.
Kristoff is a Dutch psychiatrist who has come to Paris to learn new methods of treating the mentally ill, especially those veterans shell-shocked from their experiences in the Great War. He becomes friends with his neighbors living on the floor below him in his apartment building, a family who fled from the Nazis in Poland. He also spends considerable time with one of the other residents at his hospital exploring the network of tunnels under the city. When the Nazis begin emptying the psychiatric wards and rounding up Jewish families, Kristoff is forced to act in the only way he knows how.
How Ms. McLain binds these seemingly disparate stories together as both plot lines build to a climax keeps the reader turning the pages to find out what happens next, and if there is any hope for the future in either timeline. Highly recommended.