Ray, Conker, and their Rambler friends face the Gog and his Machine in a final struggle at the 1893 Chicago Exposition.
- ISBN10 0375955682
- ISBN13 9780375955686
- Publish Date 23 August 2011
- Publish Status Cancelled
- Out of Print 5 February 2015
- Publish Country US
- Imprint Random House Books for Young Readers
- Format Hardcover (Library Binding)
- Pages 400
- Language English