In the year 241, twelve-year-old Lina trades jobs on Assignment Day to be a Messenger to run to new places in her decaying but beloved city, perhaps even to glimpse Unknown Regions.

"Sara Blum lives an idyllic life with her adoring parents in Vichy France. But her world comes crashing down when the Nazi occupation separates the family and forces the young Jewish girl into hiding. Her classmate Julien and his family will risk everything to ensure her survival, and, together, Sara and Julien manage to find beauty in a secret world of their creation."--Provided by publisher.

When Mae's Aunt Willa and Aunt Jane, both pilots, are kidnapped by evil Metallic Falcon, Josie, Mae, and Akiko, the Infinity Trinity, pursue them from Chicago to Sweetwater, Texas, to Paris, France.