Start with smaller (average difficulty to extremely difficult) 9x9 puzzles and then challenge yourself with 12x12 and 16x16. (easy and difficult) Then for a little diversion, try Sudoku X and hyper Sudoku.
The puzzles are two to a page, giving plenty of room for writing in the margins.
This book is in 3 sections:
20 9x9 Average puzzles20 9x9 Difficult puzzles20 9x9 Very Difficult Puzzles20 9x9 Extremely Difficult PuzzlesAnswersMakes a great gift for anyone who loves puzzles or wants to develop and keep an active brain and mind.
Related Subjects
Games