I have been told time and time again by friends that I should read this series after my enjoyment of the Atlantis series (also by Showalter). I finally relented and swapped for as many of this series as I could get. 
 While I enjoyed the overall idea, I tend to shy away from books about demons or men possessed by them. However, I will say I was intrigued enough to finish the book and hope to continue the series though I'm sure the overall issue I have will continue. 
 I do agree that Showalter is a very good writer and really grabs your attention. Although, I'm not very comfortable with Showalter's heroines being so willing to lose themselves in there man. I like a strong female character who is happy to be in love but isn't completely willing to make her life about her man/husband. Having said this it is often true in these stories that to be together the woman would have to remain wherever the hero lives because of some curse, restriction, or story rule we all accept upon reading. I get this. It is a common devise of writers. And yet any and other has used said issue and still made their female character independent and strong (case in point Gabaldon's Outlander series). 
 As, I have yet to read further into the series I cannot say if Ashlyn develops her own life while living with Maddox and his brothers-in-arms. I only hope that will be the case. Ashlyn herself was an intriguing character because not only was she coming from the stand point that supernatural things exist but she had an ability all her own. Of course, I'm not sure how much I love the idea of how she will control it. 
 As for Maddox and his brothers, they are also interesting while also being mildly disturbing. We all like a deeply flawed or emotionally scarred hero but these heroes are the ones to open Pandora's box and unleash demons on the world. Because of this they are cursed to house said demons in their bodies with no hope of being without them. The idea is that the perfect soulmate will tame the demon which is great from a story stand point while being impractical. 
 Maddox's endurance of the curse to die every night a midnight was mildly fascinating but the actual act of him being killed each night was disturbing. 
 Overall not my favorite subject matter but interesting enough.