Sudoku, a seriously addictive puzzle, is sweeping the world. It’s a phenomenon that’s spreading faster than you can count to nine. In How to Solve Sudoku, mathematician Robin Wilson gives a step-by-step guide to unraveling these sometimes infuriating but always captivating puzzles. There are examples and practice grids for you to hone your skills on before you move on to the next fiendish challenge. So if you’re feeling a little grid-locked, here are brilliant, tried and tested tips and tactics to help you get to grips with sudoku puzzles. Remember, no mathematical skills are needed. It is entirely a test of logic.