Wighard, archbishop designate of Canterbury, has been discovered garrotted in his chambers in the Lateran Palace in Rome in the autumn of AD 664. The solution to this terrible crime appears simple as the palace guards have arrested Brother Ronan Ragallach, as he fled from Wighard's chamber. Although the Irish monk denies responsibility, Bishop Gelasius is convinced the crime is political and that Wighard was slain in pique at the triumph of the pro-Roman Anglo-Saxon clergy in their debate with the pro-Columba Irish clergy at Whitby. 

In the mid-7th century AD, the Venerable Dacán, a much respected and beloved scholar of the Celtic Church, has been found murdered while on a visit to a remote abbey in the Irish Kingdom of Muman. When Dacán's foul death is used by a neighbouring kingdom to demand reparation from Muman, bloody war seems imminent. Summoned by Muman's dying king to investigate, Sister Fidelma is asked to solve the mystery of the brutal killing and by doing so to prevent the inevitable war breaking out between the two opposing kingdoms.

Sister Fidelma has been sent by her brother, king of Cashel, to Laisre, chieftain of Gleann Geis - the 'forbidden valley' - to negotiate permission to build a Christian church and school in his territory, replacing the pagan Druidic sanctuaries. Laisre is known to be hostile to the new religion, and Fidelma knows her mission will be no easy task. Entering Gleann Geis with the Saxon Brother Eadulf, she comes across the naked, slain bodies of thirty-three young men, positioned in a sunwise circle. 

As they are preparing to return to Ireland, Fidelma and Brother Eadulf receive a mysterious summons. Eadulf's childhood friend, Brother Botulf, has requested their presence at Aldred's Abbey at midnight on the old pagan feast of Yule. Fidelma and Eadulf battle against the harsh winter storms to arrive in time, only to find they are too late. Botulf is dead - killed by an unknown hand. As they struggle to comprehend this staggering news, it soon becomes clear that the murder of this young monk is not the only trouble facing the abbey.

Sister Fidelma is thrown into a sinister mystery full of intrigue, danger and violence in Peter Tremayne's fourth Celtic mystery. A headless female corpse is found in the drinking well of a remote abbey in southwest Ireland. One hand clasps a crucifix; tied to the other arm is a pagan death symbol. A merchant ship is encountered under full sail on the high seas off the Irish coast. But the crew and cargo have vanished - as if by sorcery. Whose is the body in the well? Where is the crew of the vessel? Are these bizarre events connected? And if so, who is responsible?

Ebert is not a man to make enemies. He is a chieftain with a reputation for kindliness and generosity. Yet, one night, his household is aroused by a scream from his chamber. The servants burst in to find Móen, a young man to whom Eber had extended his protection, crouched over the bloody body of the chieftain. Móen's clothes are drenched in Eber's blood, and he is clutching a bloodstained knife in his hand.There seems no doubt of culpability, but why did Móen kill the gentle and courteous Eber?

Super sleuth Sister Fidelma returns in Smoke in the Wind, the 11th perplexing historical mystery by Peter Tremayne. Sister Fidelma and her companion, Brother Eadulf, are on their way to visit the new Archbishop of Canterbury when their ship is blown off course and they land on the coast of the Welsh kingdom of Dyfed.

The Abbey of Imleach, in the southwest Irish kingdom of Muman, now rivals Armagh as the centre of the faith in Ireland. For the founder of the abbey was none other than St Ailbe, the man who brought Christianity to Muman, converted its king and baptised him at Cashel in AD448. But now, calamity has struck the community of the abbey. Not only has an elderly monk suddenly disappeared, but the holy relics of St Ailbe have also vanished. These sacred relics are not just the concern of the abbey's community but are a priceless icon and political symbol of the entire kingdom....

When Sister Fidelma sets out on a pilgrimage in the autumn of AD 666, her main preoccupation is to reflect on her commitment to the religious life and her relationship with the Saxon monk, Eadulf, whom she has left behind. Complications arise during the first night on the ship when one of the pilgrims is apparently washed overboard. The discovery of a blood-stained robe raises the question of murder, and Fidelma finds herself having to focus all her abilities on solving the mystery.  

A servant has been murdered and the baby in her charge abducted. Fidelma of Cashel has solved even more horrendous crimes in her career as an advocate of the ancient Brehon Courts of Ireland. But this case is different. For both Sister Fidelma and her companion, Brother Eadulf of Saxmund's Ham, the case is unique because of the personal emotions involved. The baby who has been abducted is their own son. What is the motive for their crime? Could someone seeking vengeance on Fidelma and Eadulf have done the deed? They have made a lot of enemies in their pursuit of justice.