Sudoku Mania: More Than 200 New Fun and Challenging Japanese Number Puzzles

I really like this book and the red covered one. They are the best ones for beginners. They are difficult but not impossibly so like a lot of the other sudoku books out there. Mostly with those you are just GUESSING. Highly recommend!

I started doing Sudoku five days ago when I picked up this book from Borders, and already I have learned to do the puzzles in this book easily and quickly - even the so-called advanced ones. I enjoyed it immensely for learning, and the book contains a lot of puzzles, but I am ready for whatever the next step is in Sudoku, and hopefully reviews of other Sudoku books will help me sort that out. I have three kids, however, who are working on a kid's Sudoku book. I am saving this book for them, as it would be a very good next step after they master the puzzles in their kid's book.