Clara Thorn, the witch that fought

Clara has spent a year mastering her unique form of magic—mathemagic—while making friends and raising borders between the Ordinary world and Underhill. As a new school term begins, she faces a mysterious challenge when her dream-elf friend reveals there is one final Border to raise in a remote, desolate part of Underhill, where an unknown force awaits. The story blends math and magic in a fresh, engaging way, featuring memorable characters and diverse ideas.