16 books in series

I Spy

I Spy is a 16-book series with 16 released primary works first released in 1992 with contributions by Walter Wick, Jean Marzollo, Carol Devine Carson, Dan Marzollo, and Dave Marzollo.

I Spy: A Book of Picture Riddles
I Spy Christmas: A Book of Picture Riddles
I Spy Fun House: A Book of Picture Riddles
I Spy Mystery
I Spy Fantasy
I Spy School Days: A Book of Picture Riddles
I Spy Spooky Night: A Book of Picture Riddles
I Spy Super Challenger!
I Spy Gold Challenger!
I Spy: Treasure Hunt
I Spy Extreme Challenger! A Book of Picture Riddles
I Spy Year-Round Challenger!
I Spy Ultimate Challenger!
I Spy A to Z
I Spy Spectacular: A Book of Picture Riddles
I Spy Love