This bestselling book features a collection of favorite I Spy riddles that send readers searching though 12 photographs and 12 months of the year in search of hidden objects. With hundreds of thousands of copies sold, the bestselling I Spy series is being relaunched with a new design and a foil jacket. This bestselling book features a collection of favorite I Spy riddles that send readers searching though 12 photographs and 12 months of the year in search of hidden objects.