Sudoku skill builder

An attractively formatted Sudoku puzzle book containing 96 puzzles at three levels of difficulty: easy, medium and hard, allowing the user to gradually build their skill. The introduction includes brief instructions on how to play. Solutions to all puzzles are included at the end of the book (ISBN: 978-0-6480782-4-1). This is the first in a series of four books. The other three books are 'Sudoku: 96 easy puzzles' (ISBN: 978-0-6480782-5-8), which contains 96 easy puzzles for busy people (book 2), 'Sudoku: 96 medium puzzles' (ISBN: 978-0-6480782-6-5), containing puzzles of medium difficulty (book 3), and 'Sudoku: 96 hard puzzles' (ISBN: 978-0-6480782-7-2), containing puzzles that are diabolically difficult (book 4).