Fallen Tears is sort of a side story/prequel to the 2nd book about one of the upcoming characters in the series, Rowan.
I liked this book more than the first I think. Rowan is very different from Dahlia in personality, though they both don't have their parents. This is a good sized novella and a very quick read. I liked seeing who this Rowan character is. She has a very tragic story, and you really start to feel for her and wish things had gone better.
What kept me from giving it more stars was Rowan's relationship with her sort of self-adopted "father". For so long, it makes it seem like they have a strong father-daughter type bond, but then it seemed to seriously go towards to something more like a romantic bond. I don't know; it just seemed an odd transition when the first bond was captured so well. When Rowan meets another guy who might be a potential love interest, I was surprised at how quickly she got attached to him. I'm not sure she is going to come across in the next Blood Crave book.
If you liked Dahlia, I would definitely recommend this book to you. It does a great job on the mysterious Rowan's background.