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Timekeepers是一群守護歷史的小小冒險家，這回他們來到維京人時代，揭開部落之戰的謎團。本書融合故事、事實、年表與小測驗，讓孩子在閱讀中穿梭古今，認識改變世界的重要時刻。The Timekeepers are a secret organization of kids who keep the course of history on track. And history needs them--a villain named DeLay is causing chaos! When the hands on their watches start to spin backward, the Timekeepers know that DeLay has been up to no good, and it's up to them to put things right... In this installment, the Timekeepers travel back to the time of the Vikings and become involved in a battle between rival clans. With a range of adventures that span all of history, The Timekeepers series is perfect for any adventure lover.

Timekeepers穿越回1889年巴黎世界博覽會，親眼見證艾菲爾鐵塔完工！但壞蛋DeLay竟偷走藍圖，歷史面臨改寫危機！The Timekeepers is a secret organization of kids who keep the course of history on track when a villain named DeLay tries to cause chaos. When the hands on their special watches start to spin backward, the Timekeepers know that DeLay has been up to no good, and it's up to them to make things right. In this installment, the Timekeepers travel back to the 1889 World's Fair to see the unveiling of the newly built Eiffel Tower. However, things don't go as planned when they discover that the villainous DeLay is up to his old tricks and has stolen the blueprints! With a range of adventures that span all of history, The Timekeepers series is perfect for any adventure lover.