Thank you @poisonedpenpress for a copy of this book. A thriller that is Christmas themed, sign me up! This felt like an adult version of The Inheritance Games where you solve riddles to win a giant house. This was a locked room mystery with the snowstorm and the family members there all earning keys to win the house. I liked the premise of the story but once people started dying, the rest of the family members continued their game. This just seems so bizarre to me. The narration of Lily was well done and you could feel her emotions of not knowing who to trust.