In all, the following Seuss books have some minor characters and/or settings incorporated into the show:

In 1997 it acquired the rights to the Seuss books, written by Theodore Geisel (a k a Dr. Seuss), from Geisel's widow, Audrey.

It is the second Seuss book to feature Horton the Elephant, the first being Horton Hatches the Egg.

He works hard blending the disparate styles into an interesting and edgy alliance, using the Doctor's own Diffendoofer sketches and pieces of finished art from other Seuss books by means of collage.

Not so coincidentally, the Turner effort is being coordinated with marketing strategies to sell Seuss books and new lines of clothing for children.

In the Seuss book, they are illustrated as gentle folk, but in the cartoon, they look more like Yosemite Sam or Elmer Fudd.

It was the first Seuss book to arouse calls for its removal from school curricula - the badge of honor for any serious children's author.

"It's the titles of the Seuss books, all 44, and no other lyrics," said Judith Haut, vice president and director of publicity at Random House Children's Books.

The book was first published in 1937 by Vanguard Press, unlike later Seuss books, which were published by Random House.

Marco is from another Seuss book named And to Think That I Saw It on Mulberry Street, which is the first Seuss book.