[sufue]

A couple of fairly recent titles in the Mara/Burren series by Cora Harrison are pretty cheap at Kindle UK:

Condemned to Death, #12, £1.76
link: https://www.amazon.co.uk/Condemned-D...dp/B00QSBNYM6/

Spoiler:

When Mara, Brehon of the Burren, is summoned to the sandy beach of Fanore, on the western fringe of the kingdom of the Burren, she sees a sight that she has never witnessed before during her thirty years as law-enforcer and investigating magistrate: a dead man lying in a boat with no oars. Immediately her scholars jump to the conclusion that the man has been found guilty of kin-murder. The Brehon sentence for this worst of all crimes is that the murderer be towed out to sea and left to the mercy of wind and waves and the ultimate judgement of Almighty God. But Mara notices something odd about the body, something which arouses her suspicions. And something familiar about the boat in which he lies. Soon she has embarked on a full-scale murder investigation. And gradually suspicion dawns that someone near and dear to her is involved in the murder.

Fatal Inheritance, #13, £1.83
link: https://www.amazon.co.uk/Fatal-Inher...dp/B01ATM8S9I/

Spoiler:

Mara, Brehon of the Burren, must battle superstitious beliefs and fears as she sets out to solve a brutal murder.

When a woman’s body is discovered, strangled and bound with rope to the stone torso of Fár Breige, the ancient stone god which stands sentinel above the haunted caves and ancient fortifications of the Atlantic cliffs, the locals believe it was the god who killed her.
In life, Clodagh O’Lochlainn had been a disgrace to her clan, tormenting her former priestly lover, jeering at her husband, robbing her relatives: but could she really have been slaughtered by a vengeful god, as the local population believes? Abandoning preparations for the celebration of her fiftieth birthday, Mara, Brehon of the Burren, with the assistance of Fachtnan and her scholars, takes up the task of solving the murder. Ignoring the ancient legends, she concentrates instead on bringing a mortal killer to justice. But it’s only when Fachtnan’s small daughter is lost in the labyrinth of passages among the caves that the horrifying truth begins to emerge.