I'm the author of the ASHFALL three-and-a-half-ology: ASHFALL, ASHEN WINTER, SUNRISE, and DARLA'S STORY.
I loved everything about this book except the (lack of an) ending. Terrific dark fantasy with a fascinating story structure--alternating chapters skip back and forth between two storylines that take place decades apart. Sounds strange, but Duey makes it work. The book just ends--there's not really a cliffhanger, nor any kind of resolution in any of the storylines, otherwise, it'd be a five-star read.