The Times Super Fiendish Su Doku Book 10: 200 challenging puzzles/fr-ca/the-times-super-fiendish-su-doku-book-10-200-challenging-puzzles/6024D992-A577-46E2-92BE-EA29BDAC01FF.html6024D992-A577-46E2-92BE-EA29BDAC01FF
The Times Super Fiendish Su Doku Book 9: 200 challenging puzzles