A Northern Light, or A Gathering Light in the U.K., is an American historical novel for young adults, written by Jennifer Donnelly and published by Harcourt in 2003. Set in northern Herkimer County, New York in 1906, it is based on the murder of Grace Brown case —the basis also for An American Tragedy by Theodore Dreiser (1925). In the U.K., Bloomsbury published an edition within the calendar year, entitled A Gathering Light, and Donnelly won the 2003 Carnegie Medal, recognizing the year's outstanding book by a British author for children or young adults. For the 70th anniversary of the Medal a few years later it was named one of the top ten winning works, selected by a panel to compose the ballot for a public election of the all-time favourite. Plot summary The novel is written in alternating chapters from the past and present. The novel begins in the present day, with teenaged Mattie Cokey working at The Glenmore, a hotel on Big Moose Lake, to earn money during the summer. One of the hotel guests, Grace Brown, asks Mattie to burn a pack of letters. Later that day, Grace is found dead in the lake near the hotel. Mattie remembers the letters, which she did not have time to burn. She is drawn in by the mystery of what they might say, and she begins to read them. They reveal some shocking information about Grace's lover, Chester Gillette, who checked into the hotel as Carl Grahm. Grace was pregnant with Chester's child at the time, so he killed her. In the past, Mattie Cokey remembers her life on her family's farm in the Adirondack Mountains of northern New York. In 1906, when she was 16, Mattie dreamed of going to Barnard College. Her best friend, Weaver Smith, shows Mattie's writings to their teacher, Miss Wilcox, who sends an application for Mattie to Barnard. Mattie gets a "full scholarship" but cannot afford to buy the books and a train ticket, or to leave her family's farm. In an attempt to raise the money, Mattie cleans her rich Aunt Josie's house every week, but Aunt Josie refuses to pay her and tells Mattie she is selfish to leave the farm and the family. Meanwhile, Mattie fends off the romantic advances of her neighbor Royal Loomis. Royal tries to connect with her by giving her a book for her seventeenth birthday.