The Philadelphia adventure /

In 1876, on the eve of the Centennial Exposition in Philadelphia, twenty-year-old Vesper Holly and her friends clash yet again with the archfiend Dr. Helvitius, whose evil schemes plunge them into danger in the wild Pennsylvania countryside.

Bibliographic Details

Main Author:	Alexander, Lloyd
Format:	Book
Language:	English
Published:	New York : Dell, 1992.
Subjects:	Adventure and adventurers > Fiction. Pennsylvania > Fiction.