Sudoku Helper: MasterMind Puzzles

This book has several great features: * all the puzzles are above intermediate level * the perforated-pages can be torn out to take along with you * the little grid numbers help you keep track of your thought processes I often am interrupted while doing a puzzle. Then when I have time to get back to it, I have forgotten some of my reasonings. I found myself making notations in the squares with other books, which makes the puzzle a mess! This book makes it easy to keep track as you eliminate possibilities for each square. Because you can blot out numbers as you eliminate them, getting back into the puzzle is a snap. You will become addicted to this method, I predict. I left my book at a hotel last night, so I am buying 2 more. I love this format and don't want to be without pages again! I hope more volumes are published.