First of all, I'm always torn with how to rate this book. I love the premise (who doesn't love a dark, angsty male lead seeking redemption?) but the world-building, dialogue, etc. could have used serious work. Nevertheless, I enjoyed the book very much and have read it several times, hence the generous rating.
Quick summary:
Netta Trilett is kidnapped from her room one night by the very same man who killed her fiance. Despite his fearsome appearance and murderous record, the Dark Angel Tahn seeks to protect Netta and several young children (Dark Angels in training)from his evil leader Samis.
Pros:
I love Tahn...he is the quintessential dark hero who believes he's past redemption yet still gallantly rescues others. Kelly gives some of his back story--definitely enough to satisfy you in this first installment--but fleshes it out in the next books.
The kids are great: Stuva, Vari, Temas...I haven't read this book in many months but I can still remember most of the names! Kelly does a great job of making each child unique and memorable. I loved the contrast between their innocence/curiosity and the maturity they gained as a result of Samis' training.
The plot also moves well, with a great balance between action and contemplative moments, and both give insight into the characters.
Cons:
The world building could have been done better. I didn't mind it too much in this book since there's enough context for me to grasp the conflict surrounding Tahn, the Dark Angels, the Trilletts, villagers, etc., but it still would have been nice to know more about the time period, setting, etc. There's never an outright statement about time and setting, but the book seems to take place in a medieval-like era.
The dialogue was rather annoying. I didn't mind it too much at first, just thinking it was a bit weird, but it got progressively more irritating, especially after reading the sequels. Characters were always saying, "God's mercy." (I don't actually own a copy of the book, so I can't give examples, but suffice it to say that the dialogue had a lot of repetitive and oddly worded phrases).
Overall:
The book was an enjoyable read and definitely the best of the series. In fact, I thought this was a standalone novel, because it wraps up everything rather nicely. (I actually recommend readers to just stick with this book and not read the sequels).