by Gordon Korman (2014)
Amy and Dan Cahill have their final confrontation with twisted billionaire J. Rutherford Pierce, a man whose power has no limits and is one step away from being elected president. Amy and Dan Cahill have their final confrontation with twisted billionaire J. Rutherford Pierce, a man whose power has no limits and is one step away from being elected president. Book #4
Lloyd Alexander
In 1873 seventeen-year-old Vesper Holly and her guardians travel to an obscure European grand duchy, where their archenemy Dr. Helvitius is pursuing a lost art treasure and engineering the country's annexation by a neighboring kingdom.