KenKen "How To" For Experts - Free Number Puzzles! Sudoku on Steroids!
Thomas Snyder Outdoes the NYT KenKen Puzzle
KenKen Puzzle: 300 Easy to Hard (6x6) Puzzles + 300 Solutions Math Logic Puzzles, Size 8.5" x 11" with 108 pages|Keep Your Brain Young by SYDNEY LARSON | Goodreads
More KenKen Puzzles
Play KenKen 6x6 Every Day on the Puzzle Society | Puzzle Society
KenKen Puzzle Official Site - Free Math Puzzles That Make You Smarter!
Mix & Match KENKEN: 160 Mind-Stimulating Logic Puzzles That Make You Smarter (Paperback) | East Bay Booksellers