It is 1890. A year after Holmes's death, Watson -- now in a retirement home -- narrates a tale of Sherlockian detection that could tear apart the very fabric of society. The story opens with a train robbery in Boston, and moves to the innocuous setting of Wimbledon.

"Hercule Poirot rushes to France in response to an urgent and cryptic plea from a client. But the Belgian detective arrives just too late: the man who had summoned him is found dead on a golf course, stabbed in the back with a letter opener and wearing an ill-fitting coat with a mysterious love letter in its pocket. Strange circumstances multiply, culminating in the discovery of a second body stabbed with the same murder weapon. While the local authorities...

Maisie Dobbs' first assignment for the British Secret Service takes her undercover to Cambridge as a professor, and leads to the investigation of a murderous web of activities being conducted by the up-and-coming Nazi party.

Lady Julia and her detective husband, Nicholas Brisbane, join Julia's siblings in tracking down a murderer in India. Set in 1889, the mystery explores India's colonial tensions.

Days after the encounter at the Swiss waterfall that claimed the lives of Sherlock Holmes and criminal mastermind Professor Moriarty, Pinkerton detective agent Frederick Chase and Scotland Yard Inspector Athelney Jones, a devoted student of Holmes's methods of investigation and deduction, must track down a sinister figure who is determined to stake his claim as Moriarty's successor.

During World War I, fifteen-year-old Mary Russell, walking the fields near her home, meets the famous (and now retired) detective, Sherlock Holmes. Mary does not immediately recognize him. She replies to his condescending remarks with brilliance and biting wit. Holmes is astounded by the young woman's intelligence and soon takes Mary and her education under his charge. When not studying university texts, she assists him on local cases. But then...

Nation Day is a big deal on Walcot Street. Thousands of people gather to enjoy music, food, drink and the pleasures of a giant street party. It's different for the people who live and work on Walcot Street, like the Lunghi family and their detective agency. For them the day must be endured. But who expected the trouble to include a dead body?

Trust is a delicate thing, and no one knows that better than Rosalind Thorne. Lady Melbourne has entrusted her with recovering a packet of highly sensitive private letters stolen from her desk. The contents of these letters hold great interest for the famous poet Lord Byron, who had carried on a notorious public affair with Lady Melbourne's daughter-in-law, the inconveniently unstable Lady Caroline Lamb. Rosalind is to take up residence in Melbourne...