The Seattle puzzle
created by Gertrude Chandler Warner ; illustrated by Robert Papp.
- Morton Grove, Ill. : A. Whitman & Co., 2007.
- 111 p. : ill. ; 20 cm.
- Boxcar children ; #111 .
When the Alden children accompany their grandfather on a trip to Seattle, they discover clues throughout the city, seemingly planted just for them.