Thomas and his bionic best friend, McGrowl, suspect that the leaders of a school nature trip are actually an evil duo from the past.
- ISBN10 0606299327
- ISBN13 9780606299329
- Publish Date 1 September 2003
- Publish Status Out of Print
- Out of Print 1 September 2015
- Publish Country US
- Imprint Turtleback Books
- Edition Turtleback School & Library ed.
- Format Hardcover (Library Binding)
- Language English