Storming Heaven — Christopher G. Nuttall

A thousand years ago, the enigmatic Killers destroyed Earth, leaving only a handful of humans in surviving space-based habitats to rebuild as best as they could.  Now, the human race has spread through countless star systems, but remains hopelessly inferior to the Killers.  The god-like aliens are systematically driving humanity to the verge of extinction.Desperate times need desperate measures and humanity launches a crazy plan, to board and seize a Killer starship, hoping to unlock their technology.  But the Killer plan to rebuild the universe from scratch is well underway, leaving humanity at the verge of total extinction.  If they fail, the Killers will be the only form of life remaining in the entire universe…