Nia Mya Reese Nia Mya Reese wrote "How To Deal With and Care For Your Annoying Little Brother."

At only 8 years old, Nia Mya Reese has already mastered the art of caring for another human being. So much so that she’s written a best-selling how-to book on it titled How To Deal With and Care For Your Annoying Little Brother.

It all began last year with a first-grade class assignment for students to write a descriptive piece on something they have learned to excel in.

Nia Mya ― who lives in Hoover, Alabama ― chose her “downright annoying” 5-year-old brother Ronald Michael as the subject for the assignment, she told CBS News.

“Nia Mya shared that she was a great big sister to an annoying little brother,” her first-grade teacher, Beth Hankins, told CBS.

Her mother, Cherinita, then advised Nia Mya to extend the assignment into the summer.

Nia Mya said it only took a few days to place all of her big sister expertise, including how to make learning enjoyable, in the book, which became available on Amazon last November. The book has since been branded with the website’s coveted best-seller tag. Hoover Mayor Frank V. Brocato even came by Nia Mya’s latest book signing.

When asked by CBS about her biggest takeaway from the experience, Nia Mya replied: “I learned to follow my own dreams.”

You can watch more of CBS’s interview with Nia Mya below: