num_pages: 150
description: 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!
language: English
title: The Philadelphia Adventure
titlecomplete: The Philadelphia Adventure
characters: Vesper Holly
genres: Historical Fiction, Historical, Childrens, Juvenile, Young Adult, Teen, Fantasy, Mystery, Adventure, Fiction
ratings_count: 629
series: Vesper Holly
publisher: Puffin Books