In Bruno's Shadow by Tony Ardizzone
A troubled young Croatian woman named Dubravka travels to the site of apparitions of the Virgin Mary and witnesses a miracle. Twenty years later, after working as a kitchen sister in a cloistered convent, she goes to Rome where she finds that for a few months prior to the pope's death her habit of prayer triggers miracles of sorts in others. The chapters describing their overlapping experiences in Rome alternate with the chapters presenting the story of Dubravka's life