Promise by Kristie Cook was referred to me by a good friend who absolutely loved it. I liked Promise, but did not love it. Lexi's attraction to Tristan reminded me of another pair of popular characters who experience a similar dangerous attraction. This similarity actually made their relationship seem less endearing to me. Other elements of the book, such as Lexi's and Tristan's origins and the common enemy was unique and enjoyable. I thought there would be a hidden enemy that did not materialize, which I was glad did not unfold. Overall a good read.