While trying out the spy glasses, spy hat, and other items in their new spy kit, seven-year-old Henry and his dog Mudge make a new friend and form a spy club.
- ISBN10 0689811764
- ISBN13 9780689811760
- Publish Date 1 February 1998 (first published 1 January 1998)
- Publish Status Active
- Publish Country US
- Publisher Simon & Schuster
- Imprint Simon Spotlight
- Edition Repackage ed.
- Format Hardcover
- Pages 40
- Language English