Written and illustrated by Graeme Base, the mystery picture book The Eleventh Hour revolves around Horace the Elephant’s eleventh birthday party, to which he invites his ten best animal friends. Before the guests can enjoy the wonderful feast, they must play eleven party games. By eleven o’clock, the time of the feast, a shocking discovery is made: someone has eaten all the food! It is up to the reader to identify the thief by deciphering the messages and codes on each page. The question is, Did the grey cat do it?