From PBS NewsHour.

A never-before-seen Dr. Seuss’ book, “Sing the 50 United States!” is set to be published next year.The unpublished book by Dr. Seuss — born Theodor Geisel — was discovered in the archives of UC San Diego’s Geisel Library. About 500,000 copies will be released on June 2, 2026, Random House Children’s Books and Dr. Seuss Enterprises said in a news release.

It’s the first posthumous Dr. Seuss book to be published since 2015, when the then-newly discovered “What Pet Should I Get?” hit stands. Before that, the last Dr. Seuss book to be published was “Oh, the Places You’ll Go!” which came a year before his death in 1991.

“Sing the 50 United States!” features the Cat in the Hat and two Little cats who help teach the names of all 50 states in a rhyming fashion. The publishing date for the book will closely coincide with America’s 250th anniversary, which occurs about a month later.

Watch PBS News for daily, breaking and live news, plus special coverage. We are home to PBS News Hour, ranked the most credible and objective TV news show.

Sign up for Here’s The Deal with Lisa Desjardins: https://to.pbs.org/41q6E8i
Subscribe for exclusive content in our newsletters: https://www.pbs.org/newshour/subscribe
PBS News podcasts: https://www.pbs.org/newshour/podcasts
Stream your PBS favorites with the PBS app: https://to.pbs.org/2Jb8twG
Find more from PBS News at https://www.pbs.org/newshour
Subscribe to our YouTube channel: https://bit.ly/2HfsCD6

Follow us:
TikTok: https://www.tiktok.com/@pbsnews
X: http://www.twitter.com/newshour
Instagram: http://www.instagram.com/newshour
Facebook: http://www.pbs.org/newshour