I know there are times when you can't be infront of the computer playing my sudoku puzzles, so here are some of the sudoku books I have enjoyed.

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This book isn't the hardest puzzles out there, but at this price its ok if you forget it on the plane.	Michael Mepham is one of my favorite puzzle writers. Here are several of his books I've finished.

Looking for puzzles hard enought to make you cry?	And finally here are some variants on the usual sudoku puzzle.