A new title in the Fiendish Su Doku series, concentrating entirely on
the more difficult Super Fiendish puzzles
These previously unpublished quality Su Doku grids from the puzzle
providers to the Times will help extreme puzzles who are looking for a
real puzzling challenge. The treacherously difficult puzzles in this
collection will stretch even the most advanced Su Doku enthusiast to use
all of their best solving techniques. These puzzles are of the highest
quality and are perfect for the advanced solver in need of a constant
supply of ultra-difficult puzzles. They are guaranteed to provide hours
of mind-stretching entertainment.