Fury Freed — Melissa Haag

While preparing to leave Uttira after graduation, Megan finds the Book of Fury. The answers she's needed about who she is, her purpose, and her powers have been there the whole time, along with a shocking revelation. Now, it's not just a matter of finding Megan's mother. Megan must find the two preceding generations as well, because the book is clear on one thing: there can only be three furies.

Complete series reading order:
Fury Frayed
Fury Focused
Fury Freed