The numbers are waiting for you. Sharpen the pencil.400 Sudoku puzzles very hard (Veteran levels). + 250 Sudoku difficult level that can be downloaded and printed.+ 250 maze puzzles that can be downloaded and printed.Unique puzzles.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