Yuukoku no Moriarty: The Remains

In the late 19th century, Great Britain rules over a quarter of the world. Nobles sit in their fancy homes in comfort and luxury, while the working class slaves away at their jobs. When young Albert James Moriarty’s upper-class family adopts two lower-class orphans, the cruelty the boys experience at his family’s hands cements Albert’s hatred of the nobility he was born into. He asks the older of the two boys—who has a genius mind and a killer instinct—to help him rid the world of evil, starting with Albert’s own family! (Source: VIZ Media)

William is intrigued when a man in a tavern sees through Moran's cheating and challenges him to a game of poker for a large sum of money. There's also an over-zealous Louis who names the tropical fish he's assigned to keep "William", Albert and Moran compete in a wine-drinking contest, and John becomes a detective instead of Sherlock, and shows off his famous (?) deductions. The daily research records that were not shown in the main story are released for the first time!! (Source: Shueisha, translated)

When Sherlock is asked to find the son of a nobleman, he enlists William's help to infiltrate the club where the nobleman lives. They get to the bottom of the case, but a hostage taker, a "game enthusiast", forces them to take part in a game of Russian roulette. In four short stories, Bond teaches acting to the Whitechapel troupe, Jack is put to the test when the three brothers become his apprentices, and Sherlock is introduced to a strange case on holiday by Mycroft! (Source: Shueisha, translated)

In this light novel based on the Moriarty the Patriot series, William visits a department store in London to get a present for Louis and Albert when it is suddenly attacked by a mysterious armed group! Together with help from a mysterious girl, William tries to get control of the situation. Meanwhile, Sherlock becomes Gregson’s assistant as he investigates a locked-room mystery! (Source: Shueisha, translated)