By Isabella Biedenharn
August 06, 2015 at 02:58 PM EDT

Dr. Seuss’ long-lost picture book, What Pet Should I Get?, released July 28, has already sold 200,000 copies in its first week — which makes it both the fastest-selling picture book in Random House Children’s Books history and the fastest-selling picture book across the industry this year. According to President & Publisher Barbara Marcus, many booksellers across the country reported that What Pet was “their biggest-selling title, adult or children’s, last week.”

The title currently sits at No. 1 on Publisher’s Weekly‘s overall best-seller list, ahead of such blockbusters as Go Set A Watchman, Grey, and Paper Towns.

These rapid sales are a new phenomena even for a legend like Seuss: EW recently spoke with Cathy Goldsmith, Random House’s art director, who explained that even though the author/ illustrator’s classic book, Oh, The Places You’ll Go, is ubiquitous now, “It did not even debut at the top of the New York Times best seller list the first year,” she said. “But the whole industry was very different then. There’s no way that book would not have been No. 1 if we published that today.” Looks like Goldsmith is right.

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