London, 1880. When accounts clerk Ernest Stibbins approaches the World's End investigation bureau with wild claims that his wife Albertina has been warned by her spirit guides that someone is out to harm her, the bureau's owner Lily Raynor and her new employee Felix Wilbraham are sceptical. How are the two private enquiry agents supposed to investigate threats from beyond the grave? But after she attends a seance at the Stibbins family home, Lily comes to realize that Albertina is in terrible danger. And soon, so is Lily herself....

After the assassination of FDR in the 1930s, the US collapses and is picked off by the UK, Canada, Mexico, and Russia. Gunnie Lizbeth Rose tries to piece out a life, running security on runs from Texoma across the border to Mexico, where work and prospects are stronger. When two Russian magicians come looking for a man named Alex Karkarov, they hire Lizbeth, but there are problems: The man they're looking for is dead, but he has a daughter they now need to find, as an ever-growing set of sorcerers and gunnies do not want them to succeed.

Librarian Sylvia Ashe knows nothing about her past, having grown up without a father and a mother who refused to discuss him. When she stumbles upon a diary that suggests she's descended from magicians, she's skeptical. After all, magicians are special, and she's just an ordinary woman who loves books. She seeks answers from a member of the most prominent family of magicians, but she quickly learns that finding the truth won't be easy, especially when he turns out to be as artless as her, and more compelling and dangerous than books.

Lady Emily Hardcastle is an eccentric widow with a secret past. Florence Armstrong, her maid and confidante, is an expert in martial arts. The year is 1908 and they've just moved from London to the country, hoping for a quiet life. But it is not long before Lady Hardcastle is forced out of her self-imposed retirement. There's a dead body in the woods, and the police are on the wrong scent. Lady Hardcastle makes some enquiries of her own, and it seems she knows a surprising amount about crime investigation...

As the Great Blizzard of 1888 cripples the vast machinery that is New York City, heiress Prudence MacKenzie sits anxiously within her palatial Fifth Avenue home waiting for her fiance's safe return. But the fearsome storm rages through the night. With daylight, more than 200 people are found to have perished in the icy winds and treacherous snowdrifts. Among them is Prudence's fiancé - his body frozen, his head crushed by a heavy branch, his fingers clutching a single playing card, the ace of spades.

Billie, Mary Alice, Helen, and Natalie have worked for the Museum, an elite network of assassins, for 40 years. Now their talents are considered old-school and no one appreciates what they have to offer in an age that relies more on technology than people skills.

As the city prepares to celebrate Queen Victoria's golden jubilee, Veronica Speedwell is marking a milestone of her own. After burying her spinster aunt, the orphaned Veronica is free to resume her world travels in pursuit of scientific inquiry - and the occasional romantic dalliance. As familiar with hunting butterflies as she is fending off admirers, Veronica wields her butterfly net and a hatpin with equal aplomb, and with her last connection to England gone, she intends to embark upon the journey of a lifetime.

Cavalry captain Gabriel Lacey returns to Regency London from the Napoleonic wars, burned out, fighting melancholia, his career ended. His interest is piqued when he learns of a missing girl, possibly kidnapped by a prominent member of Parliament. Lacey's search for the girl leads to the discovery of murder, corruption, and dealings with a leader of the underworld.

Amina al-Sirafi should be content. After a storied and scandalous career as one of the Indian Ocean’s most notorious pirates, she’s survived backstabbing rogues, vengeful merchant princes, several husbands, and one actual demon to retire peacefully with her family to a life of piety, motherhood, and absolutely nothing that hints of the supernatural.

London, 1654. Oliver Cromwell is at the height of his power and has declared himself Lord Protector. Yet he has many enemies at home and abroad. London is a complex web of spies and merchants, priests and soldiers, exiles and assassins. One of the web's most fearsome spiders is Damian Seeker, agent of the Lord Protector. No one knows where Seeker comes from, who his family is, or even his real name. All that is known of him for certain is that he is utterly loyal to Cromwell and that nothing can be long hidden from him.

Before Jack the Ripper terrorised London, Police Inspector Samuel Ravenscroft patrolled the streets of Whitechapel. Clever and hard-working, Ravenscroft nonetheless has the worst record in the force. He lets a murderer escape during a chase and is banished to the spa town of Malvern for a water treatment to cure his asthma. Ravenscroft accepts a dinner invitation from a new acquaintance, Jabez Pitzer. Before dinner, the maid finds Pitzer slumped over his desk - dead. Ravenscroft immediately recognises the signs - Pitzer has been poisoned.

In the sleepy village of Cookingdean, Dr Nell Ward is busy working in the grounds of a local manor house. Whilst inspecting an old tunnel, she did not expect to overhear a murder. As the only person with any clues as to what happened, Nell soon finds herself in the middle of the investigation. Desperate to clear her name Nell, along with her colleague Adam, set out solving the murder using their skills as ecologists to uncover details no one else would notice. But it soon becomes clear that playing Agatha Christie is much harder than it might, at first appear.

In the spring of 1685, Lord Hugo Everly, ardent supporter of the Protestant upstart the Duke of Monmouth, vanishes without a trace just before the Monmouth Rebellion, leaving future generations forever baffled as to what might have become of him. In 2013, while visiting Everly Manor as part of her job as a location scout for a film production company, Neve Ashley stumbles onto a secret passage that leads her into the 17th century and straight into the path of the ill-fated lord.

It is 1914, and as the war draws the young men of Britain away to fight, women must keep the nation running. Two of those women are Peggy and Maude, twin sisters who live on a narrowboat in Oxford and work in the bindery at the university press.

The warden of St Serf's has been found dead in the almshouse garden. He appears to have been killed on the previous night but there are those who are convinced he was present at that morning's service, The elderly residents, the almshouse nurse and Humphrey, her deranged favourite, have all been set against one another by the dead man's scheming - and then there is the discarded mistress and almshouse ghost to consider.