Sir Callie and the Champions of Helston

In a magical medieval world filled with dragons, shape-shifters, and witches, a twelve-year-old hero will search for their place as an impending war threatens. A thrilling middle-grade series opener that stars a nonbinary tween and explores identity and gender amid sword fights.

My name is Callie, and I'm not a girl. I am here as Papa's squire, and I want to train as a knight.
 
In a world where girls learn magic and boys train as knights, twelve-year-old nonbinary Callie doesn't fit in anywhere. And you know what? That's just fine. Callie has always known exactly what they want to be, and they're not about to let a silly thing like gender rules stand in their way. 
 
When their ex-hero dad is summoned back to the royal capital of Helston to train a hopeless crown prince as war looms, Callie lunges at the opportunity to finally prove themself worthy to Helston's "great and powerful."
 
Except the intolerant great and powerful look at Callie and only see girl.
 
Trapped in Helston's rigid hierarchy, Callie discovers they aren't alone--there's Elowen, the chancellor's brilliant daughter, whose unparalleled power is being stifled; Edwyn, Elowen's twin brother, locked in a desperate fight to win his father's approval; and Willow, the crown prince who was never meant to be king.  
 
In this start to an epic series packed with action, humor, and heart, Callie and their new friends quickly find themselves embedded in an ancient war--the only hope to defeat the dragons and witches outside the kingdom lies in first defeating the bigotry within.