The Blood Detective by Dan Waddell

Just OK, probably wouldn't read this author again. In a London cemetery, a man’s body is found. During the autopsy, the police discover the body has been marked with a string of letters and numbers that appears to be the code for a particular file in the Family Records Centre. To locate the file and unearth its relevance to the murder, police engage the services of Nigel Barnes, a professional genealogist. So begins the first installment of what one hopes will be a series featuring Barnes, a wily and likable amateur sleuth. This is journalist Waddell’s first novel.