The Polar Night Bride

Dr. Sloane Mercer begins sixty days of Arctic darkness with one captive patient: Varek Nystrom, an Eclipse-born vampire-wolf hybrid whose blood neutralizes the White Hunger. When infected shifters breach Outpost Erebus and Apex Biologics sends a strike team to purge the evidence, Sloane ends the medical hierarchy and allies with Varek. Together they must escape the collapsing station without letting his antibodies become a weapon of vampire genocide.

A wolf-shifter doctor enters sixty days of darkness with her captive hybrid, then learns his blood can cure one species by exterminating another.