The ragtag group of orphan boys known as the Baker Street Irregulars faces shady characters and seemingly real ghosts when they assist the famous detective, Sherlock Holmes, in investigating the mysterious death of Greta Berlinger during a seance.

The year is 1907, the setting is Baker Street, London. When the Martian Ambassador arrives at Holmes' door seeking the Great Detective's help in solving a grizzly murder, how can he refuse? The case will involve a trip to the Red Planet, where few humans have been privileged enough to visit. Ever since the second wave of Martians arrived on Earth, inoculated against the germs that had halted their tripods the first time around, and humanity accepted...

Encyclopedia Brown, boy detective, solves ten more mysteries. The solutions are given at the end of the book.

"A young woman begs Sherlock Holmes to help find her missing fiance, but the great detective makes an uncharacteristic mistake. Then Sherlock's daughter, Lucy James, takes on the missing person case of her own. But Lucy must also keep a vicious criminal away from Becky, Lucy's ten-year-old sister-in-law, and little Becky soon becomes dangerously involved in both cases. No one foresees the devastating news that Sherlock Holmes has been murdered.."...

"Sherlock Holmes acquires a new client when a beautiful young woman, Isabel Stone, faints on the steps of his Baker Street rooms. She has come to beg his assistance in reclaiming some priceless jewels kept from her by her tyrannical stepfather, Captain Grimbold Pratt. But shortly after agreeing to take her case, Captain Pratt comes to Baker Street, not quite so tyrannical as Isabel would have them believe. Holmes and his cousin, Dr Henry Vernier,...

"A puzzling case of murder and the hunt for an ancient lost treasure call master detective Sherlock Holmes and his trusted assistants, the Baker Street Irregulars, to action..."--p.[4] of cover.

"The Holmes family plans to celebrate the Easter holidays in London until a tragedy during the 1868 Oxford-Cambridge boat race puts Mycroft Holmes' character on the line. When Mycroft identifies a drowning victim, he is drawn into a situation that could destroy not only the name of the deceased Lord Surminster, but his own reputation as well. If ruled a suicide, the lord's assets will be returned to the Crown, leaving his mother and siblings destitute....

Retold in graphic novel form, Sherlock Holmes is called in when Miss Susan Cushing receives a cardboard box containing two human ears--from two different people.

Retold in graphic novel form, Sherlock Holmes investigates the appearance of some strange drawings.