The Root Cellar is a children's historical novel by Janet Lunn that is set in the 1980s, although much of the action takes place in the 1860s. It follows Rose Larkin, an orphan, who travels temporally back and forth between Ontario, Canada, of the 1980s and various settings of U.S. Civil War in the 1860s. This time travel is done through the root cellar of the title. Source: Wikipedia (en)