Download or read book The Times Super Fiendish Su Doku Book 4 written by The Times Mind Games and published by Collins. This book was released on 2017-05-04 with total page 320 pages. Available in PDF, EPUB and Kindle. Book excerpt: The 200 puzzles in this collection of treacherously difficult puzzles will stretch even the most advanced Su Doku enthusiast. You will need to use all of your best solving techniques to get to the end of this testing challenge. The puzzles in the collection are of the highest quality and are perfect for the advanced solver in need of a constant supply of ultra-difficult puzzles.