On Beyond Zebra!

On Beyond Zebra! is a classic illustrated children's book by Theodor Geisel, better known as Dr. Seuss. This book fits into the genre of literary nonsense. The young narrator, not content with the confines of the ordinary alphabet, invents additional letters beyond Z, with a fantastic creature corresponding to each new letter. The creatures include favorites such as the Floob-Boober-Bab-Boober-Bubs, large buoyant heads which float serenely in the water. These naturally serve as the example for the letter "FLOOB".