(From the publisher):
Delving into the mystery of the origins of Western civilization, Vesper and her friends set out for the site of the legendary Troy, only to fall into a trap laid by the despicable Dr. Helvitius. Helvitius imprisons the companions in the palace he calls Xanadu, and Vesper will need all her intellectual cunning to engineer an escape.
Original title: The Xanadu Adventure
Genre: Fiction→ Children & Young Adult→ Adventure