Free Preview of Logic Puzzles for Adults & Seniors: 500 Hard Puzzles (Sudoku, Shikaka, Calcudoku, Creek, Hakyuu, Fillomino, Suguru, Skyscrapers, Killer Sudoku, Binary, Grand Tour and Futoshiki)
Logic Puzzles for Adults & Seniors: 500 Hard Puzzles (Sudoku, Shikaka, Calcudoku, Creek, Hakyuu, Fillomino, Suguru, Skyscrapers, Killer Sudoku, Binary, Grand Tour and Futoshiki)