Whiteout — Greg Rucka

You can't get any further down than the bottom of the world - Antarctica. Cold, desolate, nothing but ice and snow for miles and miles. Carrie Stetko is a U.S. Marshal, and she's made The Ice her home. In its vastness, she has found a place where she can forget her troubled past and feel at peace... Until someone commits a murder in her jurisdiction and that peace is shattered. The murderer is one of five men scattered across the continent, and he has more reason to hide than just the slaying. Several ice samples were taken from the area around the body, and the depth of the drilling signifies something particular was removed. Enter Lily Sharpe, who wants to know what was so important another man's life had to be taken for it. But are either of the women prepared for the secrets and betrayals at the core of the situation?