A newly discovered Dr Seuss story called What Pet Should I Get? goes on sale tomorrow, nearly 50 years after it was written.
The Art of Seuss curator Bill Dreyer says Dr Seuss is "more popular now than he was in his lifetime".
"In the 25 years since he's now been gone, another 450 million books have been sold," he says.
There is a story about how the new book was found, says publisher Cathy Goldsmith.
"Shortly after Dr Seuss died, his widow did some renovations in the house, and I think the box was packed up then and just forgotten about," she says.
"[When I found out about it] I went literally running down the hall to my boss' office and said, 'They found a box, they want us to come and look'."
Watch the video for the full CBS report.
