Top 10 Best Ispy Books

I Spy Treasure Hunt: A Book of Picture Riddles

I Spy Spooky Night: A Book of Picture Riddles

I Spy Animals

I Spy Fantasy: A Book of Picture Riddles

I Spy: A Book of Picture Riddles

I Spy Extreme Challenger: A Book of Picture Riddles

Scholastic reader, Level 1: I Spy 4 Picture Riddle Books

I Spy School Days: A Book of Picture Riddles

I Spy Fun House: A Book of Picture Riddles

I Spy Super Challenger