Blood And Birch. Whiteout Sins, #21

The cruelest prisons have no locks. Only someone warm on the other side of the wall. Vesper Linwood came to the treacherous Cascade Mountains to scatter her murdered sister's ashes. She didn't plan on getting trapped in a brutal winter storm. And she certainly didn't plan on being saved by Torin Blackwood-a massive, heavily scarred recluse who rules the surrounding four hundred acres of frozen wilderness.
Stranded in his isolated, snowbound cabin, Vesper is entirely at Torin's mercy. He is silent, commanding, and possesses a dark, volatile energy that sets all her forensic instincts on edge. But the freezing temperatures aren't the most dangerous thing on the mountain. As the days bleed into weeks of forced proximity, Vesper's desperate search for answers about her sister's death leads her to a terrifying revelation: Torin is the one who found her sister's body.
And he hid it. Now, Vesper is locked in a deadly psychological game with a man who might be a protector, a captor, or a killer. Yet, as the lines between survival and submission blur, the blistering heat between them becomes impossible to ignore. Torin's fierce protectiveness is intoxicating, and Vesper finds herself drawn to the very darkness she should fear. But spring is coming. And with the thaw, the real monster stalking the woods will return.
Vesper must decide if she can trust the man who lied to her, or if loving him will be the most fatal mistake of all.