Readers can immerse themselves in the fanciful world of Dr. Seuss yet again.

The book, “What Pet Should I Get?” will be released on July 28, more than 20 years after the La Jolla author died.

The author’s widow discovered the manuscript for the book in 2013; it’s believed to have been written sometime between 1958 and 1962.

The picture book follows a brother and sister who visit a pet store to pick a pet, but aren’t able to decide on just one. It features the same brother and sister from Seuss’ well-known “One Fish Two Fish Red Fish Blue Fish.”

Random House Children’s Book is publishing the new book and has said it has plans for two more books by the late author.

Dr. Seuss, whose real name was Theodor Geisel, died in 1991. He and his wife, Audrey Geisel, were longtime La Jolla residents and made a number of contributions to UC San Diego.

In fact, Audrey Geisel recently donated $3 million to renovate the university’s iconic Geisel Library. Library staffers say they intend to put the money toward digitizing the space.

“It gives me great joy to help ensure that Geisel Library will continue to attract and fuel students, scholars, and community members who are passionate about learning,” Geisel said in a news release.