This biography of Martin Luther, written by Eric Metaxas, tells the story of how Luther rediscovered God and changed the world. The book covers topics such as Christianity, Protestantism, Europe, Germany, and 16th century history. It is a religious and historical account of Luther's life and his impact on the world. The book is 496 pages long, hardcover, and published by Penguin Publishing Group in 2017. The book's dimensions are 9.4 x 6.5 x 1.7 inches, and it weighs 28.3 ounces. The illustrator of the book is Yes.