Book of Donmon Teith

The ultimate test of logic, these challenging puzzles take sudoku to a whole new level. The killer sudoku is a favourite in the Telegraph newspaper and with puz

Brace your braincells for the ultimate mental workout with this collection of killer sudoku from the Telegraph.

You don't need to be a maths expert to get hooked on sudoku, the nation's favourite number challenge. Test your logic to the limit with a brand new compilation

***The biggest and best book of sudokus returns for a sequel! Choose from 400 puzzles with a range of difficulties ranging from beginner to fiendish! Relax and

Amusing fitness, warm-up, training and positive energy for the brain. 60 sudoku killer puzzles 8x8 very hard levels. 60 sudoku killer puzzles 9x9 very hard leve