Charlie, Pony Girls series, by Lisa Mullarkey, published by Calico (an imprint of Magic Wagon, a division of ABDO), 2019.

About the book:

It’s a new year at horse camp for new Pony Girls! Charlie, Gracie, Paisley, and Zoey narrate their own stories as they navigate anxiety, learn about caring for animals, and take photos for the camp newspaper. Readers new to chapter books will love this look into the world of Storm Cliff Stables, with larger text, fewer words, and younger girls in the same pastoral setting!

Charlie is excited to come to Storm Cliff Stables, but she is also very nervous. She has panic attacks. The other Pony Girls help her find some strategies to calm her anxiety. They get a big idea when they visit the Horse Rescue Center, but can they convince Aunt Jane to get a new farmyard friend?