Jacob Grimm (1785-1863) is the author, along with his brother Wilhelm, of the classic tales of folklore and fantasy collectively known as Grimm's Fairy Tales. Also a librarian and dictionary writer, Jacob was an acclaimed linguist and academic who elaborated "Grimm's Law," a major historical breakthrough in the development of the study of linguistics. Wilhelm Grimm (1786-1859) studied law in the early 1800s but became much better known as an accomplished and passionate storyteller and, with his brother Jacob, one of the Grimm Brothers, who gave the world the groundbreaking and fantastic collection of folklore, fairy stories, and fantasy tales we now call Grimm's Fairy Tales. Maria Tatar is the John L. Loeb Research Professor and a Senior Fellow at Harvard University. The editor of the Norton Critical Edition of The Classic Fairy Tales and The Annotated Brothers Grimm, she lives in Cambridge, Massachusetts. Maria Tatar is the John L. Loeb Research Professor and a Senior Fellow at Harvard University. The editor of the Norton Critical Edition of The Classic Fairy Tales and The Annotated Brothers Grimm, she lives in Cambridge, Massachusetts.