num_pages: 40
description: All-new riddles that are harder than ever and gorgeous photographs culled from the original I Spy books create the ultimate I Spy challenge!
language: English
title: I Spy Ultimate Challenger! A Book of Picture Riddles
titlecomplete: I Spy Ultimate Challenger! A Book of Picture Riddles
genres: Childrens, Picture Books, Nonfiction
ratings_count: 182
series: I Spy
publisher: Scholastic