The Worthy Soldier. The Gareth & Gwen Medieval Mysteries, #9

A celebratory feast ends in carnage in the ninth Gareth & Gwen Medieval Mystery . May 1147. Gareth and Gwen have traveled to Deheubarth in the retinue of Prince Hywel. The Prince of Gwynedd has temporarily allied himself with King Cadell and his Norman relations in order to finally evict the hated Flemings from south Wales. But while the battle goes well, the celebratory feast afterwards does not, leaving Gareth and Gwen among the few left standing.
And it is to them, as always, that the investigation falls and on whom peace in Wales may well depend. The Worthy Soldier is the ninth Gareth & Gwen Medieval Mystery. Complete Series reading order: The Good Knight, The Uninvited Guest, The Fourth Horseman, The Fallen Princess, The Unlikely Spy, The Lost Brother, The Renegade Merchant, The Unexpected Ally, The Worthy Soldier, The Favored Son, The Viking Prince, The Irish Bride, The Prince's Man, The Faithless Fool, The Honorable Traitor, The Admirable Physician, The Shattered King.
Also The Bard's Daughter (prequel novella).