Books with title I Spy: Year-round Challenger

With rhyming riddles and search-and-find photographs, more than 300,000 copies of I Spy Year-Round Challenger have been sold!A compilation of twelve amazing search-and-find photographs culled from the eight original I Spy books with "challenging" new riddles. Contents includes "Stegosaurus," "At the Beach," "Nature Close-Up," "House on the Hill," and more!More than 300,000 copies of I Spy Year-Round Challenger have been sold!