A murder mystery unfolds across your desk. Read closely, follow the leads.

Take on a case in Sherlock Holmes’s London. Explore a highly detailed map of Victorian London, read each case chapter by chapter, examine curious documents, and piece together the evidence left behind. A passing remark may contradict an alibi; an ordinary object may change your understanding of the crime. The accounts are yours to examine. The deductions are yours to make.

• Seven cases by Nick Macari, including The Man Who Died Twice, Phantom of London, and Murder in Color and others.

• Steam Workshop support: discover more cases from the community, or write and share your own.

• A highly detailed historical map of Victorian London.

• Book-style storytelling with narrated chapters and read-along highlighting.

Each discovery gives you somewhere else to look. Search the illustrated London map or consult the directory to find a person, an address, or your next lead. Follow a suspicion across the city, then return to an earlier account with a different understanding of what was said.

Settle into the investigation at your own pace. Listen to a chapter, jot down a question, and spread the evidence across your desk. Some connections come quickly. Others begin with a small detail you cannot quite explain—until something you discover later makes it click.

• Investigate through witness accounts, clues, documents, and newspaper articles.

• Search a detailed illustrated London map and directory for your next lead.

• Keep personal notes and return to evidence as your understanding changes.

• Answer the case’s final questions with your own deductions.

Investigate seven cases by Nick Macari, then discover new mysteries through Steam Workshop. Expand your library with cases from the community, or create and share your own.

Calling all sleuths—let the investigations begin!