When misadventure led a schoolboy in London to employment at Baker Street, few could have guessed where his introduction to Sherlock Holmes would lead. But as the lad matures and he finds himself caught in the middle of a murder investigation, his friendship with Holmes and Watson lures him into the role of detective. 'Billy' documents his experiences, and soon his sleuthing skills not only bring him to another murder, but also lay the foundation for his metamorphosis into a famous mystery writer.

The Keys of Death is Baker Street bedrock. In Gretchen Altabef’s 1880 novel, Sherlock Holmes, Doctor Watson, and Mrs. Hudson begin something great in the world.

December 1927. Mystery-writer Marius Quin has one previous bestseller, endless looming mortgage payments, and no idea how to write his next book. When his childhood friend Lady Isabella Montague invites him to an intimate New Year’s Eve party hosted by a narcissistic actor, Marius seizes upon the distraction. With his perpetually glum Basset hound along for the ride, he navigates the snowy lanes to the opulent estate of Everham Hall. As the celebrations begin, fireworks light up the sky, champagne corks pop, and then the host is murdered…

Hans Castorp is, on the face of it, an ordinary man in his early 20s, on course to start a career in ship engineering in his home town of Hamburg, when he decides to travel to the Berghof Santatorium in Davos. The year is 1912 and an oblivious world is on the brink of war. Castorp’s friend Joachim Ziemssen is taking the cure and a three-week visit seems a perfect break before work begins. But when Castorp arrives he is surprised to find an established community of patients, and little by little, he gets drawn into the closeted life and the individual personalities of the residents.

Sherlock Holmes is a fictional detective of the late 19th and early 20th centuries, who first appeared in publication in 1887. He is the creation of Scottish born author and physician Sir Arthur Conan Doyle. A brilliant London-based detective, Holmes is famous for his intellectual prowess, and is renowned for his skillful use of deductive reasoning (somewhat mistakenly - see inductive reasoning) and astute observation to solve difficult cases.

London 1900 and Sherlock Holmes finds himself investigating a string of murders that have one common thread -- each of them recalls one of his earlier cases. Has that great mind finally cracked - Watson wonders - and how is all this connected to Britain's latest secret weapon and the doings of the enigmatic Graf von Bork and the mysterious Society for Anglo-German Solidarity?

At Oxford they jokingly called themselves The Seven Sinners. Now, 30 years later, they are being murdered - each in the manner of his particular 'sin'. Who is doing it and what is the connection with the twin serpents, the mysterious Emerald Lady and the holy Book of Kor? Holmes and Watson -with the aid of their new friend, Professor Challenger - must race against time and the killer...before one of the victims becomes his brother, Mycroft.

Three linked crimes test Sherlock Holmes’ deductive powers, and his skepticism about the supernatural, to the limit.

There is a persistent and incorrect idea, reinforced by countless film misrepresentations, that Sherlock Holmes and Dr. Watson were always staid and dull British chaps of middle years (or older), with Holmes a spry, cranky, and impatient eccentric, and Watson a white-haired and portly Boobus Brittanicus, a la Nigel Bruce. Students of the true and Canonical Sherlock Holmes know this to be a falsehood.

Scarred by his experiences in World War 1, German doctor Sebastian Braun lives a quiet life tending to his patients and his beloved garden. Until Sophie Hathaway bursts into his life and challenges his dearly held beliefs. And just at the moment Sebastian discovers love for the first time, war is on the horizon once again, threatening not just his peace of mind. As the Germans approach the Channel Islands, Sebastian has to make choices: be the peace-loving man he has become or stand up and fight for his principles?

London 1899 and a matter of grave national importance. American impresario Florenz Adler, has rebuilt Shakespeare's Globe playhouse. The grand opening is to take place in the presence of Her Majesty Queen Victoria. Amid the excitement, the actors receive sinister warnings in the form of cryptic quotations from Shakespeare's plays and a drawing of a rose. A hoax? A literary joke? But not for long - the joke turns sour as the murders begin, each an exact copy of a death in a Shakespeare play.

From some clear pieces of glass and a raven's feather, the great detective must divine exactly who the client was and what prompted him to seek assistance at 221B. Fortunately, Holmes has a number of experts upon whom he can rely as well as his own vast store of esoteric knowledge. Treading a twisted path, Holmes soon finds himself matching wits with an unseen criminal, who appears to be the equal of the late Professor Moriarty. At the same time, he is tasked with sparing the monarchy any possible embarrassment that may stem from the investigation.

Upon returning to the city of Khelathra-Ven after five years fighting a war in another universe, Captain John Wyndham finds himself looking for somewhere to live, and expediency forces him to take lodgings at 221b Martyrs Walk. His new housemate is Miss Shaharazad Haas, a consulting sorceress of mercurial temperament and dark reputation.

January 1888: Dr. John H. Watson has returned to 221b Baker Street, just weeks after a personal tragedy has left him bereaved and bereft. Feeling like a broken man, his plans and dreams lying in ruin, he slowly tries to make his way forward, with the help of Sherlock Holmes and Mrs. Hudson. Unexpectedly, he finds himself standing in the path of a madman—who suddenly and irrationally blames Watson for his apparent defeat.

Professor James Moriarty has one desire left in his shattered life...revenge. All he wants is to shame the man who ruined him and stop the brute from harming anyone else. Then he meets amber-eyed Angelina Gould and his world turns upside down. An exploding steam engine kills a man at the International Exhibition. While Moriarty examines the wreckage, Sherlock Holmes appears, sent to investigate by Moriarty’s enemy. Holmes finds evidence that points at Moriarty, who realizes he must either solve the crime or swing it for it himself.