Tolkien in his purest form. Delicious book that gathers the letters and drawings he wrote to his children from 1920 to 1943, capturing the personality of St. Nicholas. The letters are closely related to the mood and the moment of the writer's own life. The book has also incorporated most of the drawings that accompanied the text, some of them imaginative and of high quality. Even the envelopes appear, on occasion, with a postmark of the North Pole, made by the author himself. These were years when correspondence was important and epistolary literature was recognized. A book that is read with a smile on one's face and each new Christmas surprises with new characters and problems. The Polar Bear of the North, is from the beginning the incompetent secretary of Saint Nicholas, who sometimes adds his comments to the letters and to whom new helpers appear, such as his nephews or an elf among others. To keep the fun going, Tolkien introduces a new alphabet.