Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Great for the Novice

I had never done a sudoku puzzle so I bought this book and loved it. So much so that I'm now online to get my next Vorderman Sudoku book.Her method takes you through 4 levels of difficulty explaining techniques for solving at each level and diagramming solutions as they are worked out.She also has scores for the puzzles which adds a little spice. For example, if your time is less than X minutes you get Y points, etc. The harder the puzzles the longer you have to solve them, but the times are often pretty challenging.Interestingly, I found that I trusted Carol to provide solvable puzzles. Some of the books I've picked up have puzzles that don't seem to be solvable - one of them even had wrong anwers in the back, i.e. the grid in the answers didn't match the grid given for the puzzle.I recommend this book to anyone wanting to learn how to solve Sudoku puzzles.