When the Boxcar Children uncover a strange puzzle in a friend's backyard, it's just the beginning of the "spy game" — a search for clues leading to gold! The children must make sense of a mysterious old photo and a riddle. But soon the children begin to suspect that there's a mystery inside the mystery. Just who is behind the spy game, anyway?
- Available now!
- New eBook additions
- New kids additions
- New teen additions
- Most popular
- Always Available eBooks
- See all
- Available now
- AZ's Most Popular Audiobooks
- New Audiobooks
- Always Available Audiobooks
- New kids additions
- New teen additions
- Try something different
- Extremely Funny Audiobooks
- See all