Irene Hannon is certainly one of the better Christian-romance-suspense writers out there, alongside Dee Henderson. Her characters are engaging and enjoyable, and while she does tend towards a certain homogeneity in her plotting and her heroes, she also makes some good points about faith and life along the way. I also enjoy that she brings in characters from previous series in supporting roles - it's fun to spot characters from "Heroes of Quantico" popping up.
Unlike Henderson, Hannon doesn't have endless irritating typo/grammar errors which detract from the stories and characters. I really enjoy Henderson's characters and storytelling, but it's a shame the proofreading is a huge letdown at times.
Nothing earth shatteringly original here, but an enjoyable, somewhat suspenseful tale with a few interesting twists and turns along the way. If you enjoy Dee Henderson, Lynette Eason and their ilk, and reading suspense and romance with a religious theme, then you will probably find yourself becoming a fan of Irene Hannon, too.