"The Restless Flame" by Louis de Wohl is a historical novel vividly recounting the dramatic life of St. Augustine, chronicling his transformation from a worldly, sensual youth in the decadent Roman Empire to the brilliant theologian, focusing on key figures like his mother Monica and Bishop Ambrose, and exploring themes of spiritual struggle and ultimate conversion that profoundly shaped Western thought. It's known for its rich historical detail, compelling storytelling, and deep spiritual insight into one of history's great saints.