The story, due out later this year, will be based on her twins and is co-authored by her husband Nick Cannon, reported BBC online.
It will be called 'Roc and Roe's Twelve Days of Christmas' and feature Moroccan (Roc) and Monroe (Roe).
"We are so excited to work with the Scholastic team on our Roc and Roe picture book and we can't wait until this holiday season," said the couple.
The publishers say the book is aimed at children aged three and over and will be illustrated by New York Times bestselling artist AG Ford.
Carey gave birth to fraternal twins, girl Monroe and boy Moroccan, in April 2011.