'Horse Museum' is the latest book by Dr. Seuss, launched Tuesday at UC San Diego's Geisel Library.
The library sold copies of the book at a launch party in the Seuss room Tuesday. The book is about art, and helps kids of all sizes learn about art and museums.
Lynda Claassen, the Director of Special Collections and Archives for the Geisel Library says the book is a treasure, found in a box by Audrey Geisel, Theodor's widow, in 2013.
It was not a full book she discovered, merely a manuscript with storyboard pages. Using that manuscript, illustrator Andrew Joyner finished Seuss' work.
Inside the book, there is horse artwork from greats like Pablo Picasso and Jackson Pollack, as well as cameo appearances by familiar characters like the Cat in the Hat.
And Claassen promises it won't be the last: "there is more to come. There is always more."
Theodor Geisel died in 1991, and there have been other posthumous works published, including 2015's 'What Pet Should I Get?'
His wife Audrey died in December 2018.
'Horse Museum' is available for purchase at UC San Diego and other bookstores, as well as on Amazon.