Dark Winter is a fantastic debut of a police procedural series that takes place in northern England. Just as Detective Sergeant Aector McAvoy seems to be able to put himself in the mind of a killer, David Mark has developed his characters so completely that the reader can almost put himself in the mind of McAvoy as he is connecting dots that no one else even sees. McAvoy may be a gentle giant of a man but he is also determined to get at the truth even if his job is in jeopardy. Luckily, he finds a believer in his boss, another dedicated officer who also is fighting to keep her job.