At the outset of the 20th century, the world discovered crosswords, and the craze became an enduring pastime. At the outset of the 21st century, the world discovered Sudoku, which has proven to be a similar addiction to millions. One advantage that Sudoku has over crosswords is its international appeal: there's no need for localized knowledge or a store of literary allusions to draw on. We all know that mind games help keep our brains in good working order. So what can Sudoku offer? At the very least, solving a complicated grid requires concentration, logic and analysis of known factors to deduce the unknown. This makes Sudoku the perfect way to keep your brain in trim. The rules are absurdly simple and the basics not hard to grasp. But puzzlers need guidance to crack all but the easiest puzzles, and guidance is provided here in abundance - enough to take to you into the realm of the Very Difficult and the Fiendish. Two-colour type and ingenious use of graphics make this Sudoku solver a pleasure to use. The reader progresses through 52 stages, each with a selftesting puzzle in which you time yourself to monitor your progress. With every other person commuting on a bus or train seemingly hunched over a grid, you could even begin to feel a little left out if you haven't cracked the Sudoku code. This little book takes you right to the top.