Having traveled in her time machine to the court of Kublai Khan, Kat comes to the aid of a Mongolian princess who is facing a fearful future.

During a family trip to China, eleven-year-old Mia Chen and her older brother Jake follow clues and solve riddles in hopes of finding their missing Aunt Lin and, perhaps, a legendary treasure.

Presents a history of the ancient world, from 6000 B.C. to 400 A.D.

This comprehensive activity book and curriculum guide about the Middle Ages contains comprehension questions and answers, maps and geography activities, coloring pages, lists of additional readings in history and literature, and simple, hands-on activities designed for grades one through four.

Kat and Aunt Jessie visit Renaissance Italy with their time machine, where Kat and her friend, a would-be artist, inadvertently become involved in a plot to steal notebooks from Leonardo da Vinci.

Stranded in Victorian England, Kat tries to locate the inventor who can restore her time machine and send her home.

Traveling back in her time machine to an archaeological dig in Egypt of 1892, Kat uncovers a plot to steal historical treasures-- and blame an innocent man.