Sent to Lisbon and Morocco, where a British studio is creating a silent film version of "The Pirates of Penzance," Mary Russell investigates a series of crimes targeting the production and confronts a high-stakes situation when actual pirates orchestrate a hostage situation.

Maintaining tenuous contact only by means of coded messages and cryptic notes with her husband, Sherlock Holmes, and with Holmes' young granddaughter in her safekeeping, Russell will have to call on instincts she didn't know she had as the famous husband and wife sleuths are pursued by a killer immune from the sting of justice.

Sherlock Holmes has always been the smartest man in the room, until now. There is a new criminal mastermind at large, Professor James Moriarty, and not only is he Holmes's intellectual equal, but his capacity for evil, coupled with a complete lack of conscience, may give him an advantage over the renowned detective. Holmes's investigation into Moriarty's plot becomes more dangerous as it leads him and Watson out of London to France, Germany, and finally...

After finally catching serial killer and occult 'sorcerer' Lord Blackwood, legendary sleuth Sherlock Holmes and his assistant Dr. Watson can close yet another successful case. After his execution, Blackwood mysteriously returns from the grave and resumes his killing spree, Holmes must take up the hunt once again. Contending with Watson's new fiancée and the dimwitted head of Scotland Yard, the determined detective must unravel the clues that will...