Dr. Seuss is back on the top seller's list.

The surge in sales comes just days after six of his books will be pulled from publication by the publisher.

The business that preserves and protects the author's legacy said Tuesday that the six books, including  “And to Think That I Saw It on Mulberry Street” and “If I Ran the Zoo,” will stop being published because of racist and insensitive imagery. “These books portray people in ways that are hurtful and wrong,” Dr. Seuss Enterprises told The Associated Press in a statement that coincided with the late author and illustrator’s birthday.

Now, some of his classics like “The Cat in the Hat," which is not one of the pulled books, are on Amazon and Barnes and Nobles' top-10 best sellers list.

As for the six books that were pulled, good luck finding them now. They are no longer available on the retailer's website or on the official Dr. Seuss site.