Cat the Cat is merrily dancing through the neighborhood greeting her friends and as she goes she asks the wonderful question, "Who is that?" Children who are old enough to read simple words will enjoy asking the questions aloud for her and children who are younger, will enjoy giving the answers. Look, there's duck the duck and mouse the mouse.....until, uh oh, who is that? Cat is not sure at all. Could it be that an alien has landed in Cat's neighborhood? But, with Cat's upbeat outlook this can only be one thing...a new friend to celebrate. Another simple reader from Mo Willems with repetition, rhyme and simple, bold, inviting illustrations. 32 pages Ages 3-7