Publisher's Synopsis
Jumbo Sudoku: Hard - Very Hard - Extreme is guaranteed to give your brain THE ultimate workout!
With over 400 puzzles, grouped hard to extreme, this is the ideal puzzle book for those players who like a REAL challenge.
Sudoku games are perfect for these long journeys or for home relaxation. Your logical thinking powers will increase exponentially when you get to grips with these difficult puzzles, not to mention the sense of achievement you'll get as you complete yet another one!
(Solutions are provided - will you even need them?)
