This is the second book in the Irish Village series by Carlene O’Connor.
Siobán’s café, Noami’s Bistro, is catering a wedding of a friend of Macdara at Kilbane Castle when someone in the wedding party is murdered. When Macdara’s cap is found at the scene, he becomes a suspect and isn’t able to continue his own investigation and encourages Siobán to assist, though not as much as she does.
This book doesn’t quite have the charm of the first, although it is a decent mystery. It doesn’t seem to display as much of the Irish culture.