Damaged - Ethan Stone
After reading the first book in this series, I had a soft spot for Zane Davis. I know he may not have been the most popular character due to his being less than faithful in Compromised, but I think he redeemed himself, and his honesty made him a character I could respect.

See the entire review at The Novel Approach: http://thenovelapproachreviews.com/2014/01/20/ethan-stones-damaged-is-danger-corruption-and-love-in-uniformity/