Outlander, written by Diana Gabaldon, is an epic time travel adventure set in Scotland. The story follows Claire Randall, a World War II nurse who mysteriously travels back in time to the 18th century. As she becomes entangled in the Jacobite risings and falls in love with a Scottish warrior named Jamie Fraser, Claire must navigate the dangers of the past while trying to find a way back to her own time. Outlander has gained a massive following for its rich historical detail, compelling characters, and thrilling time travel elements.