Written and illustrated by Dan Yaccarino.

40 pages; softcover.

The Luna Sisters live on the moon. Lucy lives on the bright side. She loves being creative. Nera lives on the dark side. She is always building new machines. The sisters never share anything, until they get a new pet for their birthday–Moona the fish. The girls set aside their differences to take care of their fish.

But when a strange man comes to the moon, Nera sells Moona to the Aquarius Aquarium without a thought. It is only when Nera arrives at the aquarium does she realize her mistake! But is it too late? Can Lucy help her sister rescue their beloved Moona? From Nickelodeon character designer and award-winning children’s book writer Dan Yaccarino, this funny and action-packed adventure is perfect for first graders and second graders to read on their own.