"THE DRUMS OF WAR ARE BEATING. Mages Briar, Rosethorn, and Evvy are visiting the mystical mountain kingdom of Gyongxe when they are suddenly called away The emperor of Yanjing has invited them to see his glorious gardens. During their brief stay, though, the mages see far more than splendid flowers. They see the emperor's massive army, his intense cruelty, and the devastating magic that keeps his power in place. It's not till they leave that they discover he's about to launch a major invasion of Gyongxe. The mountain land is home to many temples...including the First Temple of the Living Circle, which Rosethorn has vowed to defend. With time running out, the mages race to warn their Gyongxin friends of the emperor's plans. Duty, mystery, magic, and terror will drive them apart on the way. And while new friends will do their best to bring the mages together again on the field of battle, deadly enemies hide in every mountain pass, just waiting to destroy them."
—Battle Magic, 2013 hardcover edition
"To the veterans Family and not, Friends and not, Past, present, future, Because William Tecumseh Sherman was right And war is all hell."
Battle Magic was originally scheduled for publication in 2012. However, the publication date was pushed back to September 24, 2013.Tamora Pierce worked on the book from August 2011 till its publication. She first mentioned the title in a blog post on her personal livejournal without explicitly saying that it was the next Emelan book.
The hardcover edition was first published by Scholastic Corporation on September 24th, 2013. The Kindle edition was published October 1st, 2013.