Killing the Invisible. The Porthaven Trilogy, #2

Detective Inspector Walter Watts has always kept his emotions in check-until now. When the body of a young girl is discovered in a desolate wasteland, the weight of the case threatens to break through his carefully maintained defences. As the investigation unfolds, the lines between his personal history and professional duty blur, threatening his relationships and his job. Torn between solving the case and protecting his career, Watts knows there's only one right choice.
The trouble is. he's no longer sure what that is.