Crimson Moon. The Crimson Series, #3

Niki is a survivor. She has survived loss and abuse but finds a sanctuary of peace and security in the Okefenokee Swamp until she discovers a lost child with a frightening secret. A child others will kill to possess. Grieving the murders of his brother and sister-in-law, Tristan must find his missing five-year-old niece, Shelby. Each day she remains lost adds to his fear those hunting her will locate her first, or humans will discover her Dhampir nature.
Tristan tracks Shelby to the Okefenokee Swamp and discovers her in the arms of his fated mate. However, their family reunion is interrupted when the hunters follow Tristen to Shelby. On the run for their lives, Niki goes with Tristan to help protect Shelby. If the ones pursuing them don't kill her, Niki might lose her heart to a wolf. Can Tristan and Niki survive a clan war and claim the love destine to be theirs?