Book 1
Eliminate the Suspects
Evidence IDs, rooms, tags, codes, and foundational elimination.
Available now
Buy on Amazon
The Red Case File // Murder Mystery Sudoku
Solve the grid.
Find the killer.
Classic Sudoku becomes evidence.
Each case begins with a standard Sudoku puzzle and a short murder mystery. Solve the grid, reveal the hidden clue, compare it with the evidence, eliminate the suspects who do not fit, and make your accusation.
Explore the six-book series Get 4 free casesHow it works
Five simple steps.
1Solve the Sudoku.
2Extract the clue.
3Use the evidence.
4Eliminate suspects.
5Find the killer.
Early cases are straightforward. Later cases add decoded clues, timelines, access records, physical evidence, motive, and multi-step deductions.
Six volumes // One investigation style
The complete series
Book 2
Alibis & Lies
Timelines, statements, alibis, and objective contradictions.
Available now
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Book 3
Locked Rooms
Keys, access logs, doors, routes, and spatial constraints.
Available now
Buy on Amazon
Book 4
Cold Case Codes
Archived records, dates, chronology, and chain-of-custody logic.
Available now
Buy on Amazon
Book 5
Motive & Means
Physical evidence, opportunity, means, and motive.
Coming Soon
THE RED CASE FILE
THE FINAL
EVIDENCE BOOK 6 Cover in development
EVIDENCE BOOK 6 Cover in development
Book 6
The Final Evidence
Advanced mixed-evidence synthesis using the full investigation toolkit.
Coming Soon
Try the mechanic
Sample case: The Gallery Entry
A curator was found dead after a private viewing. Three suspects used entry codes ending in different three-digit combinations.
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The larger case file
More than Sudoku.
Murder Mystery Sudoku is one branch of The Red Case File: interactive mysteries built around evidence, elimination, and proof.
Investigate The Last BidThe Weekly Case File
Keep investigating.
A new mini investigation delivered each week, about 10 to 20 minutes per case. Follow compact evidence trails, weigh contradictions, eliminate the impossible, and make the call.
Explore the Weekly Case FileFree printable
Try four cases free.
Get the Murder Mystery Sudoku Starter Case File: one real case from each of the four books, plus the answer key. Solve the grid, read the shaded cells, name the killer.
Get the free Starter Case FileYou'll also get occasional emails about new cases and books. Unsubscribe anytime.