Alma Katsu tells a fictional account of the real-life Donner Party but with a supernatural twist. As the pioneer company makes its way across the Great Plains to California, they are plagued by hardships as a sinister force seems to be brewing. With supplies running low and members disappearing, the group begins to wonder if evil has been residing among them all along. I was skeptical about adding a horror angle to a true tale, and though it was obviously a bit loose with historical accuracy, the overwhelming sense of dread made for a fun read.