With the help of a new invention from Doc, Sean and Melissa win an all-expenses-paid trip to Washington, D.C., where they hope to solve the mystery of a missing helicopter--and of a haunted hotel.
- ISBN10 076422624X
- ISBN13 9780764226243
- Publish Date 1 September 2002 (first published 1 August 2002)
- Publish Status Active
- Out of Print 21 May 2009
- Publish Country US
- Publisher Baker Publishing Group
- Imprint Bethany House Publishers, a division of Baker Publishing Group
- Format Paperback (B-Format (198x129 mm))
- Pages 128
- Language English