The Harbour Lights Mystery by Emylia Hall

"As The Shell House Detectives try to solve a family mystery, their investigation runs dangerously close to a murder case. Are the two linked?"

 The Shell House Detectives are back. Thrown together over the solving of a murder case, unlikely couple Ally, the widow of a retired country policeman, and Jayden a much younger ex-city cop have set up the Shell House Detective Agency. Over summer they've solved some low key cases but the approach of Christmas finds them on the fringes of another murder.

Ally Bright is in Mousehole for a fun evening of carols and Christmas lights when the evening's festivities are cut short by the discovery of a dead body. Her friend Gus, despite being a budding crime writer, wants to head home immediately, but Ally is eager to find out more. This time, though, she really does have to leave things to the police.

 The dead man is quickly identified as J P Sharpe, a chef at a local restaurant, and someone with a string of enemies. An added complication is an unposted letter found in his coat pocket, which might be the solution to a local family mystery. This is something Ali and Jayden can get involved in, especially as they know those involved, but their inquiries lead them back to the killer and a dangerous situation they may not be able to get out of. 

 I really enjoyed the first in this cosy crime series, The Shell House Detectives, and if anything this return to Porthpella is better. I felt there was more opportunity this time for Hall's ability to create atmosphere and location.  The real Cornish fishing village of Mousehole, setting for the murder; with its jolly festive lights sharply contrasting with the empty dunes and lonely out-of-season vibes of Porthpella.

There's also opportunity to get to know the characters better. To explore Ally's unsettled relationship with Gus, Jayden's absorption with fatherhood and misgivings about leaving the police force, plus the lives and backstories of the 'supporting cast' of Saffron, the cafe-owning surfer, and Mullins, the inexperienced and slightly immature local policeman. 

If you're looking for a Christmassy cosy crime adventure this is perfect, but if you're looking for a snow-filled coming-of-age mystery I'd also add a suggestion to track down one of Emylia Hall's earlier novels - A Heart Bent Out of Shape