The Times Mind Games: The Times Fiendish Su Doku Book 3

Perfect for the advanced solver in need of a constant supply of ultra-difficult puzzles, this collection is guaranteed to provide hours of absorbing, brain-stretching entertainment. The puzzles are of the highest quality and supplied by Sudoku Syndication, the Sudoku suppliers to the London "Times" newspaper. Solvers don't need to be mathematical geniuses to solve these puzzles; it is simply a question of logic. Each puzzle has a unique solution--and there's no guesswork required.