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HOOVER, Ala. – What started off as a school assignment led one 8-year-old girl to land on Amazon’s Best Seller list.

Nia Mya is an 8-year-old student in Hoover, Alabama. She has an “annoying” little brother who constantly keeps her on her toes.

“He won’t always listen,” Nia told CBS News.

Nia Mya wrote a book about her adventures as a big sister titled, “How to Deal With and Care For Your Annoying Little Brother.” The book has since landed at the top of Amazon’s Best Seller list, for parenting.

The book began as a first grade class assignment last year.

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

Nia Mya’s mom, Cherinita, turned the book into a summer assignment, encouraging Nia Mya to work on getting the words and sentences just right.

Now, Nia Mya has a fan base and attends book signing for her children’s book. She said she learned something very valuable from the whole experience.

“I learned to follow my own dreams,” said Nia Mya.