I found this book to be okay. The author took many liberties with the known facts of what happened with the Donner Party, and the supernatural twist in this one wasn't super developed. It was more inserted to make it supernatural instead of taking the horror of the real life tale and running with that. 

I found the writing to be of the New Adult leaning Young Adult type. So it's written sort of in the way a young adult novel would be written, but a bit more mature (not enough to be classified as adult). It's not my favourite writing style, so no surprise I didn't really like it.

This book has good potential, but just misses the mark.