Losing Hold by Kellie Doherty

Orange and yellow star-scape dominates the cover. A beam of aqua light shoots down in the middle of the cover, crashing onto the large planet at the bottom. On top sits a triangle symbol. Stars weave themselves in and around the triangle symbol. The words Finding Hekate (title) and Kellie Doherty (author) are on the cover.
Part of the Cicatrix Duology series:

Links: Website | Universal buy link

Blurb: After escaping Donavin’s grasp, Mia Foley and her crew crash on a prison planet and need to deal with its inhabitants, beast and criminals alike. Mia hears Donavin in her mind once again and knows the transformation into one of his drones isn’t far off. Trapped in her own body, lashing against Donavin each chance she gets, and fearful that she’ll lose it all, Mia has to rely on her crew—on Cassidy—to save her. But she’s not the only one transforming in her little group, and things never go as smoothly as they could out in the black.