Turns out Lil Nas X has more than just country rap up his sleeve. The 21-year-old “Old Town Road” rapper has a penchant for literature too.

On Tuesday, the rapper revealed that he’s written a children’s book called C Is for Country.

“I’m dropping the best kids’ book of all time soon!” the rapper shared in a Tweet earlier this week before adding that he couldn’t “wait to share it” with his fans and young readers.

Nas’s children’s book is being published under Random House Kids, a division of Penguin Random House. It is currently available for preorder on their site.

According to the Random House Kids’ website, the book is a story about Lil Nas X and Panini the pony.

“Join superstar Lil Nas X—who boasts the longest-running #1 song in history—and Panini the pony on a joyous journey through the alphabet from sunup to sundown. Experience wide-open pastures, farm animals, guitar music, cowboy hats, and all things country in this debut picture book that’s perfect for music lovers learning their ABCs and for anyone who loves Nas’s signature genre-blending style,” Random House describes in its explanation.

The book is illustrated by Theodore Taylor III and promises “plenty of hidden surprises for Nas’ biggest fans.”

C Is for County comes out Jan. 5.