It is the Summer and Autumn of the Year of Our Lord 1143 in which the gentle monk, Brother Cadfael, is forced to leave the tranquility of his herb garden to find the whole truth behind the murder of a young women whose body was unexpectedly discovered in a newly tilled field recently acquired by the Shrewsbury Abbey in a land exchange.

It is nearing the end of the Year of Our Lord 1145. A monk vows to abandon all earthly ties, but how can Brother Cadfael obey when his son is captured in battle? Olivier de Bretagne is one of many young knights taken prisoner in the current power dispute in Britain, but he is also Cadfael's son, and the monk cannot be objective. A council is planned at Coventry to try to appease the warring factions, and Brother Cadfael asks leave to attend, knowing he must do all in his power to find and deliver his son. This most thrilling and humane of Ellis Peters's novels is filled with excitement, intrigue, and a meticulously depicted medieval background.

It is Summer in the Year of Our Lord 1139 when the grand festive event, St. Peter's Fair, is held in the town of Shrewsbury. The event brings pause to the ongoing civil war, as tradesman from across England and beyond arrive in the town for some much needed gaiety. That is, until the body of a wealthy trader is found in the River Severn. Was Thomas of Bristol the victim of murderous thieves? And if so, why were his valuables abandoned nearby? Brother Cadfael offers to help the merchant's lovely niece Emma. But while he is searching for the killer, the man's wares are ransacked and two more men are murdered. Emma almost certainly knows more that she is telling, as others will soon realise. Cadfael desperately races to save the young girl, knowing that in a country at war with itself, betrayal can come from any direction, an even good intentions can kill. Performed by Tony Award-winning actor Derek Jacobi, this fourth chronicle of Brother Cadfael weaves history and intrigue into an intricate web of adventure.

It is December in the Year of our Lord 1138 when Gervase Bonel dies after eating sauce laced with poison served which had been served with a partridge. The active ingredient found in the sauce was monkshood, poison if ingested and otherwise known as Wolfsbane. Brother Cadfael made the oil. Who used it as poison? Cadfael assesses the motives of Bonel’s Welsh natural son and his stepson, and deals with Bonel’s widow, who at one time long ago was Cadfae's sweetheart. Drawing upon his knowledge of both herbs and the human heart, Cadfael ultimately uncovers a deadly recipe for murder.

Christmas, 1141 A.D. Abbot Radulfus returns from London, bringing with him a priest for the vacant living of Holy Cross (known as the Foregate), a man of presence, scholarship and discipline, but neither humility nor the common touch. When he is found drowned in the mill-pond, suspicion is cast in many directions, not least toward a young man who came in the priest's train, sent to work in Brother Cadfael's garden. For he has little obvious priestly calling. Indeed, he soon attracts the friendship of a girl both beautiful and formidable. To Brother Cadfael, once wordly, now dedicated, if gently cynical, is left the familiar task of sorting the complicated strands which define guilt and innocence.

Outside the pale of the Abbey of Saint Peters and Saint Paul, in September of the year of our Lord 1140, a priestly emissary for King Stephen has been reported missing. But inside the pale, what troubles Brother Cadfael is a proud, secretive 19-year-old novice. Brother Cadfael has never seen two men more estranged than the Lord of Aspley and Meriet, the son he coldly delivers to the abbey to begin a religious vocation. Meriet, meek by day, is so racked by dreams at night that his howls earn him the nickname the Devil's Novice. Shunned and feared, Meriet is soon linked to the missing priest's dreadful fate. Only Brother Cadfael believes in Meriet's innocence, and only the good sleuth can uncover the truth before a boy's pure passion, not evil intent, leads a novice to the noose.

In the summer of 1138, war between King Stephen and the Empress Maud takes brother Cadfael from the quiet world of his garden to the bloody battlefield. Not far from the safety of the Abbey walls, Shrewsbury Castle falls, leaving its ninety-four defenders loyal to the empress to hang as traitors. With a heavy heart, Brother Cadfael agrees to bury the dead, only to make a grisly discovery: 95 bodies lie in a row, and the extra corpse tells Cadfael that the killer is both clever and ruthless. But one death among so many seems unimportant to all but the good Benedictine.

The winter of 1139 will disrupt Brother Cadfael's tranquil life in Shrewsbury with the most disturbing events. Raging civil war has sent refugees fleeing north from Worcester. Among them are two orphans from a noble family, a boy of thirteen and an eighteen-year-old girl of great beauty, and their companion, a young Benedictine nun...

In 1137 the ambitious head of Shrewsbury Abbey has decided to acquire the remains of Saint Winifred for his Benedictine order. Brother Cadfael is part of the expedition sent to her final resting place in Wales, where they find the villagers passionately divided by the Benedictines' offer for the saint's relics. Canny, wise and all too worldly, Cadfael isn't surprised when this taste for bones leads to bloody murder. The leading opponent to moving the grave has been shot dead with a mysterious arrow, and some say Winifred herself dealt the blow.

A onetime Crusader turned Benedictine monk, Brother Cadfael is a most unusual detective. Living a quiet life as a monastery herbalist, he spends his days ministering to his brothers using the medical skills he acquired in the Holy Lands - but his worldly knowledge and wide experience of human nature are frequently called upon when there is a murder to solve.... 

Gervase Bonel, with his wife and servants, is a guest of Shrewsbury Abbey of Saint Peter and Saint Paul when he is suddenly taken ill. Luckily, the Abbey boasts the services of clever and kindly Brother Cadfael, a skilled herbalist. Cadfael hurries to the man's bedside, only to be confronted by two very different surprises. In Master Bonel's wife, the good monk recognises Richildis, whom he loved many years ago before he took his vows. And Master Bonel has been fatally poisoned by a dose of deadly monk's-hood oil from Cadfael's herbarium.

When a young nun dies of a fever in the town of Beverley in the summer of 1365, she is buried quickly for fear of the plague. But one year later a woman appears, talking of relic-trading and miracles. She claims to be the dead nun resurrected. Murder follows swiftly in her wake, and the worried Archbishop of York asks Owen Archer to investigate.

The sixth medieval whodunnit to feature Owen Archer, one-eyed former soldier and occasional sleuth, opens as he accompanies a pilgrimage to Wales, country of his birth. His task is to recruit archers to send to France, but, with his companion Geoffrey Chaucer, he must also investigate the threat of an uprising against the English led by a charismatic Welshman. As he arrives, a young man is rescued, injured, from Whitesands Beach outside St. David's, by the poet Dafydd ap Gwylim, and given refuge.

Late spring, the year of our Lord 1370. Owen Archer, ex-soldier and spy, is preparing to depart Wales, his work for John of Gaunt completed. But his attempts to arrange safe passage home to York are thwarted by a mysterious suicide. In York Lucie Wilton is disheartened by her husband’s long absence and concerned by allegations against her apothecary. Then Brother Michaelo brings upsetting news, forcing her to journey to her father’s manor outside the city.

The year is 1367, and the people of York are suffering. Not only has the harvest failed, but the plague has returned. In the midst of this, scandal threatens St Leonard's Hospital, which is struggling to stay solvent and has suffered thefts. The deaths of several of its aged residents seems timely, for their care has long exceeded the sums they bequeathed. Rumours start to fly that their deaths were no accident.