Thirteen-year-old Dan Cahill and his older sister, Amy, thought the search for the thirty-nine clues leading to the source of their family's power was over, but when Cahills are kidnapped by the Vespers, Amy and Dan find themselves with only a few day to fulfill a bizarre ransom request before their friends start dying.
year: 2011
call number/section: 1000, 39, 2020, 1
subjects: kidnapping, juvenile fiction, orphans, families, cryptography, genealogy