Insatiable Darkness — L.M. Preston

Prequel to Caged Fire the Vigilant Series:

EmVee didn't know what to think about this new town her father's passion for boxing lured them. It was an unlikely location for her to pursue her dream of going semi-pro. Just when she started getting used to the school with gorgeous jocks and strange cheerleaders, the depth of the danger her father's choices dangled them in front of became clear. EmVee hoped Silas and Kayson will be able to help her uncover the mystery identity of the person who is threatening her family. The question is, will she survive to expose the mystery.
The VIGILANT SERIES
Insatiable Darkness - Book 0 - prequel to Caged Fire
Caged Fire Book 1: March 7th, 2019
Unbreakable Darkness - Book 1.5 - prequel to Book 2 (June 2019)