The Three Investigators, now seventeen, look into a blackmail scheme involving a computer virus.
  • ISBN10 0679905871
  • ISBN13 9780679905875
  • Publish Date 26 December 1990
  • Publish Status Remaindered
  • Out of Print 12 November 2014
  • Publish Country US
  • Imprint Random House Books for Young Readers
  • Format Hardcover
  • Language English