KenKen can be described simply as sudoku with basic math (addition, subtraction and/or multiplication and division). It”s a fun, addictive, clever puzzle that”s winning fans the world over.Already more than one million KenKen books have been sold in Japan and is a huge hit in The Times of London. Now, America can catch KenKen fever!Volume 2 contains 100 easy multiplication and division KenKen puzzles with How to Solve instructions and an introduction by puzzlemaster Will Shortz.