Will Shortz Presents Kenken by the Seaside: 100 Easy to Hard Logic Puzzles That Make You Smarter by Tetsuya Miyamoto, Will Shortz, ISBN 9780312546441

Publisher Description:
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.<p>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!<p>Volume 2 contains 100 easy multiplication and division KenKen puzzles with "How to Solve" instructions and an introduction by puzzlemaster Will Shortz.