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.  

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. 

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.

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.   

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?

Suspicion falls on three dark strangers from the distant land of Aksum (Ethiopia), who are guests at the Abbey of Finbarr. A panic-stricken mob attacks the abbey, leaving the religious in fear for their lives. Sister Fidelma and Brother Eadulf are called in to restore order and find the killer, but it soon becomes clear that the three mysterious strangers are hiding a dark secret. And what about the ageing Laig, a hermit-like apothecary, who is known to have instructed all three victims about the magic and power of the moon....

On a storm-driven night, wreckers drive a ship onto rocks off the coast of Ireland. An Abbess leading a pilgrimage is killed and the young religieuse with her abducted. An aging scholar is murdered in the Abbey of Ard Fhearta. Do these events have a connection? Sister Fidelma and Brother Eadulf go to Ard Fhearta to examine the mystery. But the abbey stands in the territory of the Uí Fidgente, enemies of Fidelma and her brother, the King of Cashel, and danger threatens Fidelma and Eadulf from the moment of their arrival. What is the link that connects the crimes?

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.

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. 

Hemlock at Vespers is Peter Tremayne's anthology of Celtic mysteries featuring the ever-popular 7th-century super-sleuth Sister Fidelma. Sister Fidelma originally made her debut as one of the decade's most interesting sleuths in short story form. The sharp-witted and astonishingly wise religieuse captured the hearts of many as she successfully tackled the most baffling of crimes in her other role as advocate of the law courts of Ireland, using the ancient Brehon Law system. 

AD 670. An Irish merchant ship is attacked by a pirate vessel off the coast of the Breton peninsular. Murchad, the captain, and a prince from the kingdom of Muman are killed in cold blood after they have surrendered. Among the other passengers who manage to escape the slaughter are Sister Fidelma of Cashel and her faithful companion, Brother Eadulf. The prince was Fidelma's cousin, and she is determined to bring the killers to justice....

It is AD 670, and Bishop Leodegar has called the church leaders together for an emergency meeting. But a fierce row breaks out, and the assembly descends into chaos. Later that evening one of the delegates is discovered murdered, his skull brutally smashed. Sister Fidelma and her companion, Brother Eadulf, unwittingly find themselves in the middle of a shocking murder investigation involving the most powerful religious leaders in the land. The disappearance of women and children and rumours of a slave trade indicate malevolent forces at work. 

February, AD 668, and Cashel is full of distinguished visitors. Under the old Irish custom, Fidelma of Cashel and Eadulf of Seaxmund's Ham, having been joined together for a year and a day, are to be married. But on the eve of the ceremony, the pious Abbot Ultán is found murdered in his chamber. Worse still - one of the most distinguished guests, the King of Connacht, is seen fleeing from the scene and charged with the murder. He demands his right to appoint Fidelma in his defence.

When Sechnussach, High King of Ireland, is found dead in his bedchamber with his throat cut, all clues seem to suggest an all-too-obvious prime suspect. Dubh Duin, the chieftain of the clan Cinél Cairpre, was found with the murder weapon in his hand when the High King's guards entered the royal chamber, before taking his own life. The Chief Brehon of Ireland asks Sister Fidelma to investigate and find out what possible motives could have driven Dubh Duin to assassinate the High King.