Hard on the Brain, Easy on the Eyes! Challenging, baffling, and absorbing, these KenKen(R) puzzles are easy to read and solve in large-size print. You'll need to use basic math--addition, subtraction, multiplication, and division--while also exercising your logic and problem-solving skills. The more you think ahead to your next step and consider all the possible outcomes, the better you'll get!

This monster edition of KenKen contains 300 3x3 to 9x9 size puzzles with "How to Solve" instructions and an introduction by puzzlemaster Will Shortz. The puzzles use all four mathematical operations and increase in difficulty. Features: · 300 easy-to-hard sudoku · Edited by legendary New York Times crossword editor Will Shortz · Big grids with lots of space for easy solving

Are you tough enough? Tkae on this collection of 200 devilishly difficult KenKen puzzles!

From krazydad, constructor of the wildly popular and addictive puzzles published in The New York Times as Two Not Touch, here are 360 of your favorite Star Battle puzzles. These puzzles will provide a healthy diversion for you in these challenging times, and help you make it to the other side with your sanity intact! Includes an instructive and pithy tutorial.

The hottest craze in puzzles! From puzzlemaster and New York Times crossword editor Will Shortz comes sudoku, the new "wordless crossword" puzzle that's taking the world by storm! Once you start, you won't want to stop. These addictive puzzles are easy to explain--just fill the grid with numbers according to the few simple rules--but incredibly fun and engaging to complete. You don't need any mathematics knowledge: Just supply a pencil and an inquisitive mind. This brand-new collection features original sudoku ranging from effortlessly easy to devilishly difficult, along with an introduction from Will Shortz that explains these fascinating puzzles and how to solve them. If you're a crossword fan, a fan of logic puzzles, or just a puzzle lover in general, you will be engrossed and delighted with sudoku!

A monster collection of easy puzzles.

After a three year wait there finally is a 4th volume of the "Calcudoku, Advanced Puzzles'" series. If you're looking for the most challenging Calcudoku puzzles, then look no further. Included are: puzzles using zero, negative numbers,modulo and exponentiation operators, puzzles without operators (called ``no-op'' or ``mystery'' Calcudoku),twin puzzles, and many extra large puzzles (10x10 to 15x15), and even one 17x17 puzzle!New in this volume: more puzzle variations andmore puzzles with binary operators (including the new AND operator). This voume IV has 121 completely new puzzles, explanations for the various puzzle variations, solving strategies, and all solutions. Note: the puzzles in this book are difficult. If you're looking for "light" recreational puzzles, then avoid this book. You can submit puzzle solutions online at www.calcudoku.org and score points for each correct solution.