Chris Bunch 
Firemask [EPUB ebook] 
Book Two of the Last Legion Series

On a distant planetary system, the post-civil-war cleanup has begun. But the Confederation empire’s government remains silent, without help or advice. It’s up to the men and women of the Last Legion to protect the fragile system against the intrigues of the alien Musth, bent on domination.As the Musth make their way through the streets of the planets’ cities, the Last Legion will fight them its way — with brutal guerrilla warfare against the oppressors. Against the odds.