It’s tricky, it’s addictive, it will test your powers of logic – The Sun Su Doku is set to sweep the nation.The Sun launched Su Doku on May 10th 2005 and, already, solvers are crying out for a book packed with puzzles.Sun Doku is based on the Japanese puzzle Sudoku which roughly translated means ‘single number’. It has been the most popular logic puzzle in Japan for 20 years.It requires no calculations or knowledge of maths – it works pure and simply on logic and elimination.Here you have 100 puzzles with three degrees of difficulty – Teaser, Toughie and Terminatoor. Infuriating and compulsive but great fun.