"Timeline" by Michael Crichton is a thrilling science fiction novel that follows a group of archaeologists as they travel back in time to medieval France in search of their colleague who has become stranded in the past. As they navigate the dangers and complexities of 14th-century life, they become embroiled in a war between rival French lords and must use their knowledge of history and technology to survive. Along the way, they discover shocking secrets about their own organization and the true purpose of their mission. "Timeline" is a captivating story that combines historical fiction with science fiction to create a unique and exciting adventure.