The Must Have Sudoku Puzzle Book for 2013 contains a collection of 365 sudoku puzzles of varying difficulty. ALWAYS in Stock on Amazon - A sudoku puzzle for each day of the year - 5 levels of difficulty (easy, moderate, nasty, cruel and deadly) - Date and difficulty printed above every puzzle - Only 2 large print puzzles per page, with lots of white space for scribbling - full solutions at back of the book for every puzzle - bold numbers for original clues in the solution section. The buysudokubooks.com Guarantee One often finds sudoku books with puzzles that have multiple solutions. This can waste a lot of time and drain a fair amount of ones sanity when it comes to solving sudoku puzzles. Every puzzle in this sudoku puzzle book has been carefully checked to ensure that each puzzle has only 1 possible solution. The puzzles in this book will not appear in any of the the other www.buysudokubooks.com titles