The books
One promise. Many puzzles.
Every PLANIGMA book works the same way: a puzzle with exactly one answer, checked by computer before it is printed. What changes is the world: a Victorian house with a body in one room, or a youth baseball team with one right lineup every game.
Floor-plan mysteries
Mystery Puzzles
A house, a floor plan, a handful of statements, and one person left in the room with the body. Every case is proved, never guessed.
Victorian London, 1880sHalmerton HouseA townhouse in Belgravia, fourteen people who never leave it, and an inspector who writes down where everyone stood. Three books and a collected edition: fifty-one cases, then a novel told in puzzles, then a crossing to New York with the emeralds on board.
Volume One · on saleThe Halmerton Case Files
Volume Two · out nowThe Halmerton Emeralds
Volume Three · on saleThe Halmerton CrossingSee the Halmerton House books
Volume One · on saleThe Halmerton Case FilesVolume Two · out nowThe Halmerton EmeraldsVolume Three · on saleThe Halmerton CrossingCollected
editionVolumes one to three · coming laterThe Halmerton House Collection
editionVolumes one to three · coming laterThe Halmerton House Collection
Next scenario
In preparation
A new house, a new cast, the same promise: every case checked by a program before printing, one answer only, no guessing.
Logic on the pitch
Sport Puzzles
A team, a stack of player cards, a scouting report, and one lineup that fits it. A whole season of logic, one game at a time.
Baseball logic puzzles for kids 8-12You Make the Lineup!Coach the Halmerton Foxes, a 12U youth team, through a full spring season. Every game has exactly one right lineup, and every clue is on the page.See the You Make the Lineup! booksFree bonus: Free Bonus: Spring Training & Coach's Toolkit
Basketball logic puzzles for kids 8-12You Make the Lineup! BasketballCoach the Halmerton Herons, a youth team where everyone plays, through a full season. Set the rotation before every game, crack the box score after it: every puzzle has exactly one answer.See the You Make the Lineup! Basketball booksFree bonus: Free Bonus: Preseason & Coach's Toolkit
New to the format? Try a case first