Will Shortz Presents Wild KenKen : 200 Medium-Level Logic Puzzles That Make You Smarter

Once you've mastered the easy puzzles, it's time to take it up a notch!

Features:

-200 medium-level puzzles using addition, sumtraction, multiplication, and division

-Introduction and instructions by Will Shortz

-Puzzles range from 4-by-4 to 6-by-6