Books about Detective and mystery stories (sorted alphabetically)
- ténébreuse affaire de Green-Park (French) Arnould Galopin
- Terriford mystery Marie Belloc Lowndes
- tesoro misterioso (Spanish) William Le Queux
- That Affair at Elizabeth Burton Egbert Stevenson
- That Affair Next Door Anna Katharine Green
- That Mainwaring Affair A. Maynard Barbour
- Thieves' Wit: An Everyday Detective Story Hulbert Footner
- Third Volume Fergus Hume
- Thirteenth Letter Natalie Sumner Lincoln
- This House to Let William Le Queux
- This House to Let William Le Queux
- Thousand Francs Reward; and, Military Sketches Emile Gaboriau
- Thousandth Woman E. W. Hornung
- Three Just Men Edgar Wallace
- three strings Natalie Sumner Lincoln
- three taps : A detective story without a moral Ronald Arbuthnott Knox
- Through the Wall Cleveland Moffett
- Timothy Crump's Ward: A Story of American Life Jr. Horatio Alger
- Tom Sawyer, Detective Mark Twain
- Tom Swift and his chest of secrets : or, Tracing the stolen inventions Victor Appleton
- To Win the Love He Sought E. Phillips Oppenheim
- Toying with fate; or, Nick Carter's narrow shave Nicholas Carter
- Traced and Tracked; Or, Memoirs of a City Detective James M'Govan
- Tracer of Lost Persons Robert W. Chambers
- Tracked by a Tattoo: A Mystery Fergus Hume