Elfish The King Of Rockfish is a book that pairs with the free app Elfish Rocks (iOS and Android) to create an interactive Augmented Reality (AR) experience. This informative narrative follows the story of a very talented, creative young Elfish and his many accomplishments. On its own, this book makes a perfect bedtime story, but unlike any other experience before, when this book is paired with the free app Elfish Rocks, a world of entertainment opens. Discover secret videos and songs through the Augmented Reality (AR) portion of the app on your phone or tablet.