Blackout/All Clear is a two-part alternate history novel written by Connie Willis. Set during World War II, the story follows a group of historians who travel back in time to study the era firsthand. However, due to a malfunction, they become trapped in the past and must find a way to return to their own time. As they navigate the dangers and uncertainties of war-torn England, they uncover unexpected connections and face life-altering choices. Blackout/All Clear combines elements of science fiction, historical fiction, and time travel, offering a compelling and immersive reading experience.