Alex Paknadel 
Paknadel & Trakhanov’s Turncoat #1 [EPUB ebook] 

300 years since humanity was brutally subjugated by the alien race known simply as the Management. Two years since these invaders abandoned Earth to return to their home world. Following her participation in the brutal massacre of human-alien hybrids left behind by the Management, resistance fighter Marta Gonzalez declines to join the new human government and starts her own private detective agency instead. Gonzalez is forced to confront her own bloody past and acknowledge the fact that the transition from oppression to emancipation is anything but clean.