Top 10 Best I Spy Book

I Spy School Days: A Book of Picture Riddles

I Spy Treasure Hunt: A Book of Picture Riddles

I Spy Spooky Night: A Book of Picture Riddles

I Spy Christmas: A Book of Picture Riddles

I Spy Animals

I Spy Mystery: A Book of Picture Riddles

I Spy Fantasy: A Book of Picture Riddles

I Spy Fun House: A Book of Picture Riddles

I Spy: A Book of Picture Riddles

I Spy a Dinosaur's Eye (Scholastic Reader, Level 1)