Chris Bunch 
Homefall [EPUB ebook] 
Book Four of the Last Legion Series

The Lost Legion, in a valiant fight, has reclaimed the Cumbre star system. But still no word comes from Confederation empire – the power that holds more than a thousand systems under its sway, the government the Legion serves.To find the reason for this ominous silence, the Legion travels from one galaxy to the next, seeking information. But even as they do so, sinister forces are stirring. And the blow, when it comes, will be delivered by an unexpected source.