Tridoku Sudoku. Excellent book game.: 400+. Puzzles all levels. Easy, medium, hard and very hard. Holmes presents an original logic book.(plus 250 sud

100 easy sudoku puzzles (Novice levels). 100 medium sudoku puzzles (Amateur levels).100 hard sudoku puzzles (Professional levels).100 very hard sudoku puzzles (Veteran levels).+ 250 sudokus extreme level that can be downloaded and printed.+ 250 maze puzzles that can be downloaded and printed.Unique puzzles.All sudoku tested and rechecked. Only 1 verified solution.All answers are at the end of the book.Exclusive puzzles.A great book for free time and studying the mind.I hope you enjoy the book.Best regards, Basford Holmes