The book is blue, decorated silver curves, where its edges are outlined in a darker blue, on its corners. The top center has a dark blue, filled in circle, the bottom center is an unfilled circled. The curved designs and circles are repeated on the back of the book. In the center is a large, light blue water drop with dark blue swirls inside it. A smaller version of this water drop is on the book's spine.
This book contains the elemental powers of water. When opened it releases a powerful gush of water.
Tecna opens this books after opening the wind and snow books. The water from this book pushes Tecna off the shelves, it then proceeds to fill the archive with water. A whirlpool eventually forms with Musa, Bloom, and Stella trapped in it. Aisha and Flora help their friends out. Musa then closes the book and the water disappears, leaving a pile of books and an unconscious Robo-Tecna in the middle of it.
All three elemental books (wind, snow, and water) have the same decorative curves and circles.