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Authors
Author
Conceptis Puzzles
Books
Third-Degree Brown Belt Kakuro
Conceptis Puzzles
Sudoku Variants
Conceptis Puzzles
Kakuro U: Freshman Year
Conceptis Puzzles
Masterpiece Picture Mazes
Conceptis Puzzles
Ingenious Color Picture Mazes
Conceptis Puzzles
Sudoku on the Flip Side
Sterling Publishing Company, Conceptis Puzzles