Doomsday Book is a science fiction novel written by Connie Willis. It is set in the near future where time travel is possible. The story follows a historian who travels back in time to the Middle Ages, but due to a malfunction, she ends up in the midst of the Black Death. The novel explores the challenges of time travel and the impact of historical events on individuals. With its meticulous research and compelling characters, Doomsday Book is a gripping time travel tale.