Will Shortz Presents KenKen for Your Coffee Break: 100 Challenging Logic Puzzles That Make You Smarter

Perk up your mind and start your day off right with this collection of challenging KenKen puzzles.. KenKen can be described simply as sudoku with basic math (addition subtraction and/or multiplication and division). Its a fun addictive clever puzzle thats winning fans the world over.. This edition contains 100 KenKen puzzles that use all four mathematic applications along with solving instructions and an introduction by puzzlemaster Will Shortz.