The biggest and best Sudoku book on the market - a bumper bestseller from the nation's favourite number cruncher Carol Vorderman Carol Vorderman's follow up to the bestselling How To Do Sudoku is even bigger and better. With over 400 puzzles - from easy to killer Sudoku - this is the very biggest collection on the market. Better still are the advanced secrets and tips for puzzle solving that Carol Vorderman is able to pass on to her readers.