Carol Vorderman's follow up to the bestselling "How To Do Sudoku" is even bigger and better. With over 400 puzzles this is the very biggest collection on the market. Better still are the advanced secrets and tips that Carol Vorderman is able to pass on to her readers. It may be logical but Sudoku can be infuriatingly hard. Only one person can explain clearly how to take shortcuts and make fast progress and that's the UK's best known mathematician Carol Vorderman. Give yourself something better than the usual TV repeats this Christmas! Buy copies to keep your parents and your children happy! 400 whole puzzles-worth of pleasure and peace!