Winterhome

Jessica Keller keeps pushing Buran back, using chaos and surprise as her weapons, as well as the warriors of First Expeditionary Fleet.
When her reinforcements arrive, she pushes even harder, though honestly, it doesn't matter if she wins. She must provide adequate distraction.
Why?
Moirrey and friends carry a superweapon capable of killing a god, and Jessica must buy them the time to use it.
Whatever the cost.
"Winterhome" - the penultimate volume of The Jessica Keller Chronicles - takes you to the edge of the very apocalypse. Be sure to enjoy the rest of the series, starting with "Auberon."