In the 2015 christian romance novel books, a common characteristic is the exploration of forgiveness. In the context of romance, when one character wrongs another, the concept of Christian forgiveness comes into play. It shows how love can be restored through faith - based forgiveness. Also, the characters' moral compasses are guided by the teachings of the Bible, which shapes their actions and decisions in the love story.
The books usually have a clean and pure form of romance. It's not about lust or worldly desires but rather about a deep emotional and spiritual connection between the characters. In many of these novels, the love story unfolds as the characters grow in their faith together. The settings might also be related to the Christian community, like a church or a Christian retreat, which further emphasizes the religious aspect.