Su Doku Style: 240 puzzles (Collins Su Doku) by Style Puzzles
Enjoy 240 Su Doku puzzles in this stylish book: challenging, compulsive, and terrific fun.
Sudoku (which roughly translated means single number) is Japan's most popular logic puzzle. It requires no calculations or knowledge of math: it is simply a process of logic and elimination.
240 PUZZLES TO TEST YOUR BRAIN