Daniel Pitt is delighted that his sister is visiting London with her American husband Patrick, a policeman, and their young daughter. But Patrick's trip has another purpose, for which he enlists Daniel's help. Philip Sydney, a young British diplomat, is accused of robbery and assault in Washington, but he has taken diplomatic immunity and fled to England. The perfect opportunity to obtain justice presents itself when Sydney is accused of a small embezzlement at the British Embassy in the USA, but as Daniel digs deeper into the case it becomes clear that vengeance is involved.

The year is 1861. The American Civil War has just begun, and London arms dealer Daniel Alberton is becoming a very wealthy man. His quiet dinner party seems remote indeed from the passions rending America. Yet investigator William Monk and his bride, Hester, sense growing tensions and barely concealed violence. For two of the guests are Americans, each vying to buy Alberton’s armaments. Soon Monk and Hester’s forebodings are fulfilled as one member of the party is brutally murdered and two others disappear - along with Alberton’s entire inventory of weapons.

On vacation from London on the beautiful Italian coast, 28-year-old Elena Standish and her older sister Margot have finally been able to forget some of the lasting trauma of the Great War. Touring with her camera in hand, Elena has found new inspiration in the striking Italian landscape, and she's met an equally striking man named Ian. Not ready to part from one another, she and Ian share a train trip home to England. But a shocking murder disrupts their agenda, forcing Elena to personally deliver a message to Berlin that could change the fate of Europe. 

Harry Exeter doesn't want the aid of the Thames River Police in tracking down the men who kidnapped his wife, Kate. He only asks them to help him navigate Jacob's Island, a creepy mass of decrepit buildings where he will hand off a large sum of money in exchange for her life. But when they arrive at the meeting place, Commander Monk and five of his best men are attacked from all sides, and Monk is left wondering who could have given away their plans. As Monk follows leads, it seems inevitable one of his own men has betrayed him. 

When a maid in the upper class Ellison household is strangled, Inspector Pitt is called in to investigate. He finds a world ruled by strict manners and social customs, where the inhabitants of the Ellison's neighborhood appear to be more outraged by the thought of scandal than they are by murder. Inspector Pitt finds a most unlikely ally in Charlotte, the Ellison's spirited daughter. But as the murders continue, Charlotte and Pitt find themselves drawn together by more than the investigation.

On a sunny afternoon in late June, Cambridge professor Joseph Reavley is summoned from a student cricket match to learn that his parents have died in an automobile crash. Joseph's brother, Matthew, an officer in the Intelligence Service, reveals that their father had been en route to London to turn over to him a mysterious secret document.

It's Christmas and the well-born guests who have gathered at Applecross for a delicious weekend of relaxation are warmed by roaring fires, mistletoe, and gorgeously wrapped gifts. It's scarcely the setting for misfortune, and no one - not even that clever young aristocrat and budding sleuth Vespasia Cumming-Gould - anticipates the tragedy that is to darken this light-hearted holiday house party. But soon one young woman lies dead, a suicide, and Vespasia must uncover the heartbreaking truth behind the tragedy.

At the end of her first unsuccessful season out in society, Lady Georgiana has all but given up on attracting a suitable man - until she receives an invitation to a masked Halloween ball at Broxley Manor. Georgie is uncertain why she was invited, until she learns that the royal family intends to marry her off to a foreign prince, one reputed to be mad.

In 1851, private detective Laetitia Rodd is enjoying a well-earned holiday when she gets an urgent request for her services. Mrs. Rodd’s neighbor Jacob Welland is a reclusive rich gentleman dying of consumption, and he wants Mrs. Rodd to find his brother, who has been missing for 15 years. Joshua Welland was a scholar at Oxford, brilliant, eccentric, and desperately poor when he disappeared from the university. Friends claim to have seen him since, in gypsy camps and wandering around the countryside. 

The year is 1920: Flying in the face of convention, legendary American adventuress Beryl Helliwell never fails to surprise and shock. The last thing her adoring public would expect is that she craves some peace and quiet. The humdrum hamlet of Walmsley Parva in the English countryside seems just the ticket. And, honestly, until America comes to its senses and repeals Prohibition, Beryl has no intention of returning stateside and subjecting herself to bathtub gin.

Spring, 1918. The Great War is at a crucial stage, the Germans are making one last push into France, and the Allies are struggling to hold them back. Battle lines are shifting, and men, and their machines, are being sent up and down the front to shore up defenses. Major Heathcliff Lennox, and his batman Greggs, are told to report to their new HQ. They set off on a sunlit day to fly the distance, but the enemy is never far away, and disaster strikes. They're sent crashing to the ground behind enemy lines, where life, death, and love await.

The Earl of Wrexford possesses a brilliant scientific mind, but boredom and pride lead him to reckless behavior. He does not suffer fools gladly. So when pompous, pious Reverend Josiah Holworthy publicly condemns him for debauchery, Wrexford unsheathes his rapier-sharp wit and strikes back. As their war of words escalates, London's most popular satirical cartoonist, A. J. Quill, skewers them both.

The young man with the shock of white-blond hair lay spread-eagled on the floor, surrounded by fallen books. His hand reached out to the scattered pages, as though he was trying to tell her something. But who is he? How did he come to be killed in Flora’s ordinary little bookshop? Flora finds out he was staying at the Priory Hotel, and when the gardener suddenly dies in its beautiful grounds only a few days later, she is certain that something untoward is happening in her quiet village by the sea. 

Spring, 1921. Scotland Yard sends Inspector Ian Rutledge to the sea-battered village of Walmer on the coast of Essex, where amongst the salt flats and a military airfield lies Benton Abbey, a grand manor with a storied past. The lady of the house may prove his most bewildering witness yet. She claims she saw a violent murder—but there is no body, no blood. She also insists she recognized the killer: Captain Nelson. Only it could not have been Nelson because he died during the war.

It's 1811, and the threat of revolution haunts the upper classes of King George III's England. Then a beautiful young woman is found savagely murdered on the altar steps of an ancient church near Westminster Abbey. A dueling pistol found at the scene and the damning testimony of a witness both point to one man - Sebastian St. Cyr, Viscount Devlin, a brilliant young nobleman shattered by his experience in the Napoleonic Wars.

Daniel Pitt is delighted that his sister is visiting London with her American husband Patrick, a policeman, and their young daughter. But Patrick's trip has another purpose, for which he enlists Daniel's help. Philip Sydney, a young British diplomat, is accused of robbery and assault in Washington, but he has taken diplomatic immunity and fled to England. The perfect opportunity to obtain justice presents itself when Sydney is accused of a small embezzlement at the British Embassy in the USA, but as Daniel digs deeper into the case it becomes clear that vengeance is involved.

When a desperate woman comes to Daniel Pitt seeking a lawyer for her boyfriend, Rob Adwell, Daniel is convinced of the young man’s innocence. Adwell has been accused of murder and of setting a fire to conceal the body, but Daniel is sure science can absolve him - and Miriam fford Croft is the best scientist he knows. Miriam connects Daniel with her former teacher Sir Barnabas Saltram, an expert in arson, and together, they reveal Adwell’s innocence by proving that an accidental fire caused the victim’s death. But it’s not long before Adwell is killed in the same fiery fashion.

When junior barrister Daniel Pitt is summoned to the scene of a murder in the slum area known as Mile End, he knows only that the victim is a senior barrister from his firm. To Daniel's relief, it is not his close friend Toby Kitteridge, but the question remains: What was this respected colleague doing in Mile End? The firm's head, Marcus fford Croft, may know more than he admits, but fford Croft's memory is not what it used to be. And so Daniel and Kitteridge must investigate on their own, lest the police uncover something they should not. 

A serial killer is roaming the streets of London, and Daniel Pitt's university chum Ian, now a member of the police, is leading the search. The murders are keeping his mind occupied, but when Ian learns that their old professor, Nicholas Wolford, has been charged with plagiarism, he takes the time to personally ask Daniel to defend their beloved teacher. 

On vacation from London on the beautiful Italian coast, 28-year-old Elena Standish and her older sister Margot have finally been able to forget some of the lasting trauma of the Great War. Touring with her camera in hand, Elena has found new inspiration in the striking Italian landscape, and she's met an equally striking man named Ian. Not ready to part from one another, she and Ian share a train trip home to England. But a shocking murder disrupts their agenda, forcing Elena to personally deliver a message to Berlin that could change the fate of Europe. 

When a maid in the upper class Ellison household is strangled, Inspector Pitt is called in to investigate. He finds a world ruled by strict manners and social customs, where the inhabitants of the Ellison's neighborhood appear to be more outraged by the thought of scandal than they are by murder. Inspector Pitt finds a most unlikely ally in Charlotte, the Ellison's spirited daughter. But as the murders continue, Charlotte and Pitt find themselves drawn together by more than the investigation.

In the posh London street of Paragon Walk, a young woman is brutally raped and murdered. Once again the incomparable team of sleuths, Inspector Thomas Pitt and his young wife, Charlotte, peer beneath the elegant masks of the well-born suspects and reveal that something ugly lurks behind the handsome facades of Paragon Walk, something that could lead to more scandal, and more murder.

When Thomas Pitt is summoned to Queen Victoria's private chambers, he hardly knows what to expect. When she tells him that the body of one of her closest confidants - Sir John Halberd - has been found in the Serpentine, he knows he is facing his most daunting and dangerous investigation yet. Sir John was a man who kept many secrets, moving within a circle of the most powerful and prominent members of London society. And the more Pitt learns about Sir John's past, the more he puts himself and his loved ones at risk.

It is summer 1934, and Hitler is teetering on the edge of supreme power. Any small step forward could vault him toward European domination. When Britain's MI6 gets word that a German scientist has made a breakthrough in germ warfare, they send Elena Standish on a dangerous mission to get him out of Germany before he's forced to share his knowledge and its devastating power with Hitler's elite. But the British soon learn that it's more than just time that Elena is working against. 

Callander Square is the second of Anne Perry's Charlotte and Thomas Pitt mysteries. Full of well-drawn and convincing characters, Callander Square offers a finely crafted recreation of Victorian England. The bodies of two newborn babies have been found in a park in the fashionable London neighborhood of Callander Square.