Wick, Walter. I spy extreme challenger : a book of picture riddles / photographs by Walter Wick ; riddles by Jean Marzollo. - New York : Scholastic, c2000. - 31 p. : chiefly col. ill. ; 31 cm. - I spy books . "Cartwheel books." ISBN: 9780439199001 LCCN: 00027910 Subjects--Topical Terms: Picture puzzles--Juvenile literature. LC Class. No.: GV1507.P47 / M2926 2000 Dewey Class. No.: 793.73