I Spy Ultimate Challenger

I Spy Ultimate Challenger is the fifth challenge book in the I Spy series. It has 31 pages of puzzles, and 36 pages overall.

Riddles

 * The Rainbow Express
 * Arts and Crafts
 * Baking Cookies
 * A is for...
 * The Treasure Chest Store
 * Clown Dressing Room
 * Good Morning
 * Sorting and Classifying
 * Santa's Workshop
 * Toy Planet
 * The Secret Note
 * Inventor's Workshop

Trivia

 * This is the only challenger book that has a riddle picture from I Spy Treasure Hunt