Suddenly on Tuesday, after the company that publishes Dr. Seuss books announced it would stop selling six of his titles — “And to Think That I Saw It on Mulberry Street,” “If I Ran the Zoo,” “McElligot’s Pool,” “On Beyond Zebra!,” “Scrambled Eggs Super!” and “The Cat’s Quizzer” — those books could not be found on Amazon.com for their normal prices, and any editions for sale had astronomical prices.
For example, when searching for “If I Ran The Zoo,” the Amazon site listed “1 new,” “1 used,” and “1 collectible,” but when clicking on the links for “new” or “used,” a message popped up reading, “Currently there are no other sellers matching your location and/or item specification.” Yet a “collectible” link showed the book available for $1,500.

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