Vesper Holly has foiled murderers, crossed mountains, and narrowly escaped earthquakes. Now she's home in Philadelphia, where she can relax-until President Ulysses S. Grant asks for her help. The Centennial Exposition of 1876 is about to begin, and luminaries from around the world will be there. But so will Vesper's arch-nemesis, the evil Doctor Helvetius. There's only one person who can thwart his evil plans-Vesper Holly!
"A combination of historical fact, nonstop danger and intrigue, and masterful writing." (The Bulletin of the Center for Children's Books)
The Philadelphia Adventure
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Book Details
Author(s)Lloyd Alexander
PublisherPuffin
ISBN / ASIN0142301442
ISBN-139780142301449
Sales Rank1,416,768
MarketplaceUnited States 🇺🇸