The Times Ultimate Killer Su Doku Book 3: 120 challenging puzzles from The Times (The Times Su Doku)

The Times Ultimate Killer Su Doku Book 3: 120 challenging puzzles from The Times (The Times Su Doku)

The Times Su Doku – The Times Ultimate Killer Su Doku Book 14: 200 of the deadliest Su Doku puzzles

The Times Big Book of Ultimate Killer Su Doku book 2: 360 of the deadliest Su Doku puzzles (The Times Su Doku)