I've seen several posts on the net about the zyxuzpf bird, but everyone refers to these books as the author being Dr. Seuss. I am holding "The Cat in the Hat Beginner Book in Spanish" as I type and it is by P.D. Eastman, Dr. Seuss's protege. Dr. Seuss's real name is Theodor Geisel. I don't know if there is a dictionary that Dr. Seuss created or not, but I've seen several responses that the zyxuzpf