"The Eight" is a novel written by Katherine Neville that intertwines a historical narrative with a modern-day quest. The story revolves around a mystical chess set, which is said to hold immense power and is linked to the French Revolution and the Knights Templar. The plot alternates between the 18th century and the 20th century, following two main characters, Mireille and Catherine, as they navigate challenges and uncover secrets related to the chess set. The novel explores themes of strategy, power, and the impact of history on the present.