I Spy Mystery: A Book of Picture Riddles
I Spy School Days: A Book of Picture Riddles
I Spy Fantasy: A Book of Picture Riddles
I Spy Spooky Night: A Book of Picture Riddles
I Spy Treasure Hunt: A Book of Picture Riddles
I Spy Super Challenger
I Spy Gold Challenger: A Book of Picture Riddles
I Spy Year Round Challenger: A Book of Picture Riddles
I Spy Extreme Challenger: A Book of Picture Riddles
I Spy: A Book of Picture Riddles