Most of the series deals with the romance between New York City Vice Detective Evan Cerelli and former Homicide Detective Matt Haight. The second novel in the series deals with another couple - Jim (Homicide Detective James Shea) & Griffin Drake (A screenwriter) - after their novel the series continues with two more books of Evan and Matt (concluding the series after these) including a meetup with Jim & Griffin in the 3rd novel.
This series is absolutely AMAZING. The romance between Evan and Matt was beautiful and sensitive especially because they were both in a very difficult state when they met and also because they were both "straight" and never considered they might be attracted to men. So the romance between them had a "confused feel" to it on both sides, trying to deal with life, label and stereotypes as well as the "simple romance". I loved that even though it was very heart clutching at times and very emotional I didn't feel it was stretched just for the sake of having an argument, it all felt very genuine and real. The struggles feeling very understandable. With Jim and Griffin it was different, and not only because they are both openly gay. They had a different relationship but also a very sweet one, the love building in a very easy going way.
The 5th installment was published as a bundle with the 4th one. Better buy the bundle now since the 5th installment isn't available as a standalone (both together are about a novel's length). These two installments aren't very necessary to the general plot but I guess you mostly need to read them to understand Where Jim and Griffin are in their relationship as well as what's up with Miranda (Evan's oldest daughter).
The 5th and 6th installment are different in the sense we get both couples together. It's a bit crowded yet having them both together is like getting a cookie and a piece of cake together :) The HEA was beautifully made in the 6th installment.
1. Faith & Fidelity [Evan & Matt] (Published 23 September 2008) ★ ★ ★ ★ ★
2. Love & Loyalty [Jim & Griffin] (Published 8 September 2009) ★ ★ ★ ★ ★
3. Duty & Devotion [Evan & Matt] (Published 23 March 2010) ★ ★ ★ ★ ★