From Publishers Weekly
It is 1876, and in Philadelphia the opening of the Centennial Exposition, already delayed several times, is threatened by the fiendish Doctor Helvitius. This megalomaniac has kidnapped two children in the care of the emperor of Brazil and vows to destroy the Exposition and all the world leaders present if the emperor does not accede to his demands. Desperate, President Grant lays this problem at the feet of 20-year-old Vesper Holly and her eminent guardian, Professor Brinton Garrett, who have already achieved renown for resolving knotty problems in countries far and fantastic in such titles as The Illyrian Adventure and The El Dorado Adventure . Brinny (as the professor is known to his intimates) exhibits admirable patriotism as he describes the hair-raising events that lead to the apparent downfall of Helvitius. Vesper and a faithful band of friends foil the dastardly plot of a Professor Moriarty-like villain in Alexander's thoroughly enjoyable romp. Ages 10-14.
Copyright 1990 Reed Business Information, Inc.
From School Library Journal
Grade 5-8-- This fifth Vesper Holly adventure is set during the 1876 Philadelphia Centennial Exhibition. Once again Alexander successfully combines ingredients familiar to the series' readers--eccentrically entertaining characterizations, seamless plotting, and breakneck pace. Narrated as usual by Brinnie, Vesper's guardian and friend, the events are set in motion by an appeal from President Grant when the emperor of Brazil's grandchildren are kidnapped by none other than Vesper's nemesis, Dr. Helvitius. Vesper, who must deliver a ransom at Helvitius' demand, suspects her old enemy has a larger scheme in mind, as indeed he does. As usual, events pile on top of events and each chapter ends with a cliff-hanger, speeding readers to the exciting conclusion. Fans will welcome back friends from previous adventures, especially Tobias Wistar Passavant, "The Weed," who is coming into his own here as hero and as budding love interest for Vesper. Brinnie's narration is the accustomed diverting counterpoint to the action, enriched with amusing asides. In sum, this is a treat for followers of this series; indeed for anyone who enjoys a well-told adventure story. --Christine Behrmann, New York Public Library
Copyright 1990 Reed Business Information, Inc.