Murder At Midnight by Katharine Schellman

When a body is found shot to death after an unexpected snowstorm, Lily Adler quickly realizes that some people will stop at nothing to bury their secrets this holiday season.

Regency widow Lily Adler is looking forward to returning to Hertfordshire to spend time with the family of her late husband. She is also excited that Captain Jack Hartley, her friend and confidante, will be visiting his own family after a long voyage at sea. With winter quickly approaching, Lily is most excited at the prospect of a relaxing and enjoyable Christmastide season away from the schemes and secrets she witnessed daily in London.

At a neighborhood ball, she soon becomes reacquainted with a friend of her late husband, Peter Coleridge, a wealthy man who not only manages Irish investments, but also a fund that most of the locals of Hertfordshire take part in. There, she also learns Jack’s sister, Amelia, is the subject of much of the neighborhood gossip—although Amelia refuses to explain if there is any truth to it. For a brief moment, Lily wonders if she ever really left London.

When a snowstorm forces several guests, including both the Adlers and the Hartleys, to stay the night, Lily quickly deduces that all is not well this holiday season. In the morning, a maid discovers the body of a guest in the poultry yard, shot to death—and he is the same man that is scandalously linked to Amelia.

Lily accepts the offer to assist in the investigation, but will she find more than what she bargained for the more she digs? Or will she herself be buried deep within the snow?