Ultimatum sudoku. 400 collection puzzle.

Successful fitness for the brain. 50 puzzles Sudoku Calcudoku 9x9 - hard Levels. 25 puzzles Kakuro - 9x9. 25 puzzles Kakuro - 10x10. 50 puzzles Jigsaw Killer Sudoku - hard levels. 50 puzzles Tridoku Sudoku - hard levels. 50 puzzles Sudoku Calcudoku 9x9 - very hard Levels. 25 puzzles Kakuro - 11x11. 25 puzzles Kakuro - 12x12. 50 puzzles Jigsaw Killer Sudoku - very hard levels. 50 puzzles Tridoku Sudoku - very hard levels. - unique puzzles. + 250 sudokus difficult level that can be downloaded and printed. + 250 maze puzzles that can be downloaded and printed. - only 1 verified solution. - all answers are at the end of the book. - exclusive puzzles. - a link to the surprise is at the end of the book. An excellent book for free time and mind exploration. I hope you enjoy the book. Best regards, Basford Holmes