Philadelphia Adventure Author:Lloyd Alexander 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 Docto... more »r 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)« less