Psychic Detective LogicTeens & Adults
ClueVoyant
A Quantum Puzzle Maze · Volume 1
Every vision is a possibility. Only one trail proves who did it.
Play the ClueVoyant tutorial↗✦ Featured psychic mystery
See the clue.
Catch the culprit.
ClueVoyant turns every number grid into a noir detective case. Follow the vision codes, test every suspect, and prove the only route that solves the crime.
20 books and announced volumes
across six distinctive collections
100 detective cases
✦ Psychic logic mystery
The collection
Pick your next puzzle.
Solve a psychic crime, follow a mischievous cat, explore a story-rich maze, or settle in with a crisp Sudoku grid.
ClueVoyant1 books
NekoMichi3 books
Illustrated Cat MazesAges 8 to Adult
NekoMichi: Paws and Paths
Volume 1 · 100 Illustrated Mazes
Take the scenic route. The cats certainly will.
Coming SoonAges 8 to Adult
NekoMichi: Paws and Paths
Volume 2 · Coming Soon
A new garden of curious cats and winding paths is on its way.
Coming soon
Coming SoonAges 8 to Adult
NekoMichi: Paws and Paths
Volume 3 · Coming Soon
More feline mischief, illustrated journeys, and beautifully tangled routes.
Coming soon
Maze Adventures3 books
Maze AdventureAges 6 to Adult
The Great Crystal Maze Adventure
Volume 1
Curious paths, illustrated worlds, and perilous quests.
Maze AdventureAges 6 to Adult
The Great Crystal Maze Adventure
Volume 2
A crystal labyrinth, a sleeping dragon, and a trail of gold.
Maze AdventureAges 6 to Adult
The Great Crystal Maze Adventure
Volume 3
One last treasure waits beyond the most devious crystal paths.
Novelty Sudoku3 books
Novelty SudokuAdults
Hot Singles in Your Area! Sudoku
100 Sudoku Puzzles
Nine numbers looking for the right square.
Sudoku6 books
Large Print SudokuAdults
Large Print Sudoku 365
Hard Edition · Volume 1
A full year of bold, satisfying Sudoku challenges.
Large Print SudokuAdults
Large Print Sudoku 365
Hard Edition · Volume 2
Another year of hard puzzles in an easy-to-read format.
Large Print SudokuAdults
Large Print Sudoku 365
Hard Edition · Volume 3
Keep the daily solving streak going all year long.
Pocket SudokuAges 10+
Yasuragi Sudoku
Volume 1 · 100 Puzzles
Find your calm. Challenge your mind. Never get stuck.
Pocket SudokuAges 10+
Yasuragi Sudoku
Volume 2 · 100 Puzzles
A calm pocket companion for every kind of solver.
Pocket SudokuAges 10+
Yasuragi Sudoku
Volume 3 · 100 Puzzles
More quiet grids, clever deductions, and pocket-sized focus.
Quantum Puzzle Mazes4 books
Number Logic MazeAges 10+
Quantum Puzzle Maze
Numbers, Logic & Turns · Volume 1
A strange new maze of numbers, logic, and turns.
Play the teaching guide↗
Number Logic MazeAges 10+
Quantum Puzzle Maze
Numbers, Logic & Turns · Volume 2
New clues, new creatures, and another hundred secret paths.
Play the teaching guide↗
Number MazeTeens & Adults
Quantum Puzzle Maze: Number Mazes
If You've Mastered Sudoku · Volume 1
One path. One solution. No guessing.
Play the teaching guide↗
Number MazeTeens & Adults
Quantum Puzzle Maze: Number Mazes
If You've Mastered Sudoku · Volume 2
The next step for solvers who want more than a number grid.
Play the teaching guide↗Why KeenJa
More than one way to think.
Every collection offers its own satisfying rhythm: explore a route, deduce a number, or connect clues until only one possibility survives.
Step inside a bookDistinctive puzzle worlds
Story mazes, elegant number grids, and original quantum logic each feel unmistakably KeenJa.
A satisfying challenge curve
Warm-ups build confidence before the really devious puzzles arrive.
Made for paper and pencil
Generous page sizes, clear layouts, and solutions for easy checking.
6 cases + solutionsTry before you buy
Your first case is free.
Download the 16-page ClueVoyant sampler with the visual guide, six psychic detective mysteries, and complete solved evidence boards. No email or sign-up required.